{"id":15979,"date":"2024-12-25T17:18:23","date_gmt":"2024-12-25T17:18:23","guid":{"rendered":"https:\/\/ibmaths.com\/?page_id=15979"},"modified":"2025-02-19T14:09:17","modified_gmt":"2025-02-19T13:09:17","slug":"hlaa4","status":"publish","type":"page","link":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/","title":{"rendered":"HLAA4"},"content":{"rendered":"<div class=\"brz-root__container brz-reset-all brz brz-root__container-page\">\n<section id=\"ad118814af5f7b59d1ca_hIp_EURwTWQW\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-13vwm9n\" data-brz-custom-id=\"wbAP0zyMaTSK\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"v8GgPszOs_C5\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-abovetitle brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-ff-fields brz-ft-adobe brz-fs-lg-46 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-1 brz-lh-lg-1_5 brz-text-lg-justify brz-css-ljwj3\" data-uniq-id=\"h6lI5\" data-generated-css=\"brz-css-vLxBX\"><span class=\"brz-cp-color3 brz-bold-true\">04 AA HL &#8211; Proof<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div data-brz-data-selected=\"%22%5B%5C%22h1%5C%22%2C%5C%22h2%5C%22%2C%5C%22h3%5C%22%2C%5C%22h4%5C%22%2C%5C%22h5%5C%22%2C%5C%22h6%5C%22%5D%22\" data-brz-data-minimized=\"off\" data-brz-data-minimized-tablet=\"off\" data-brz-data-minimized-mobile=\"off\" data-brz-data-include=\"\" data-brz-data-exclude=\"\" data-brz-data-marker=\"circle\" data-brz-data-anim-duration=\"0.3\" class=\"brz-toc brz-toc--opened brz-css-qrvygm brz-css-rquhun\">\n<div class=\"brz-toc-header\"><span data-brz-translate-text=\"1\" class=\"brz-toc-title brz-span brz-text__editor\">Table of Contents<\/span><\/div>\n<div class=\"brz-toc-body brz-toc-text-underline\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"af8f92801b67cc5448a8_aBNUg7YDhIyM\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-kar6vl\" data-brz-custom-id=\"rhmUZgVz1K7s\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"rAC9uEBp2CRa\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-xqE_5\" data-uniq-id=\"yMw5Z\" data-generated-css=\"brz-css-cyiS1\"><span class=\"brz-cp-color5\">Direct Proof<\/span><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"f8e847fa1e08d99f0d42_tIaNNLd25m7W\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1nehnuu\" data-brz-custom-id=\"jtedemZVdtZx\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"uY5r_AymW8aH\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"gtMK1fhgf39m\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"fCSyQ9ZKy8Xb\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-fsft-lg-0 brz-fwdth-lg-100 brz-vfw-lg-400 brz-lh-lg-1 brz-ls-lg-0 brz-fw-lg-400 brz-fss-lg-px brz-fs-lg-18 brz-ft-adobe brz-ff-fields brz-css-j08DA\" data-generated-css=\"brz-css-rpt0e\" data-uniq-id=\"hMmdd\"><span class=\"brz-cp-color3\">Direct Proof 1<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"yci6tutZgAZl\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/yfwmTex293w?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"jLBY8iWYveSg\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"xrMqncLGcOBL\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-w5mWZ\" data-generated-css=\"brz-css-q1mf2\" data-uniq-id=\"yXhhG\"><strong class=\"brz-cp-color3\">Direct Proof 2<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"n5HVBm15ZMPK\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/6NPRxrC20do?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"3b4de76eaa6ab1337be7_mBqWYGerDX00\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-18k81p4\" data-brz-custom-id=\"xY9PQ6GQ4G9U\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"f73Yg0oRxOdU\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"mJHRrPFh4Fqo\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"je08BXLVlh4S\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-ff-fields brz-ft-adobe brz-fs-lg-18 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-0 brz-lh-lg-1 brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-tp-lg-subtitle brz-css-eSY__\" data-uniq-id=\"bbhe1\" data-generated-css=\"brz-css-n0Hjp\"><span class=\"brz-cp-color3\">Direct Proof 3<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"mcwAb54AfHjA\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/lxel68K6YxQ?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"vt4YOFH1Xyqr\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"rL4dVBCHYjjw\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-dVbJY\" data-uniq-id=\"esY_y\" data-generated-css=\"brz-css-gEU1e\"><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"5aabfca1d534de51e1e0_xcaY7wpZLkdK\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1ca0lty\" data-brz-custom-id=\"b0LoHUi2J56O\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"dYO6JX2LFqQR\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-dPyLp\" data-uniq-id=\"nQH9H\" data-generated-css=\"brz-css-cRLrW\"><span class=\"brz-cp-color5\">Proof by Contrapositive<\/span><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"06a5a37601831111cb5f_h19cDQX0uHEc\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-18m8lw4\" data-brz-custom-id=\"tVKuE6AE_zfo\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"zdzJcqayj3bK\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"ayQvnZExOzJB\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"eSe2aBAOHJNI\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-fsft-lg-0 brz-fwdth-lg-100 brz-vfw-lg-400 brz-lh-lg-1 brz-ls-lg-0 brz-fw-lg-400 brz-fss-lg-px brz-fs-lg-18 brz-ft-adobe brz-ff-fields brz-css-kaNyM\" data-generated-css=\"brz-css-ezzp_\" data-uniq-id=\"aDSE5\"><span class=\"brz-cp-color3\">Contrapositive Proof 1<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"ge9YwbvWZUMt\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/lZ08ECj7r-c?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"mrjeeLcc4MlM\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"oT6yAShRI9aT\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-i4a3U\" data-generated-css=\"brz-css-vfz1L\" data-uniq-id=\"oKWPU\"><strong class=\"brz-cp-color3\">Contrapositive Proof 2<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"lW90EA2RvUis\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/bM2G916ByWg?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"6922dd9523aae795bd90_pLsAroK_gKsC\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-10isj21\" data-brz-custom-id=\"ojQGE9tnrtCC\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"nMVt8hFNhWbX\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"pxFRwBz07Zyy\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"z4arRntimLU1\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-ff-fields brz-ft-adobe brz-fs-lg-18 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-0 brz-lh-lg-1 brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-tp-lg-subtitle brz-css-hR9FA\" data-uniq-id=\"x4UrH\" data-generated-css=\"brz-css-zWyh9\"><span class=\"brz-cp-color3\">Contrapositive Proof 3<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"c8kCWEDto68f\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/lZ08ECj7r-c?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"kV6mkbwNd0yr\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"l7jOSInsF8Cv\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-qjUCP\" data-uniq-id=\"vLewW\" data-generated-css=\"brz-css-i9OlZ\"><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"cb07a7d1fa913c64b49a_hFZ38f7BIisG\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-26fo0h\" data-brz-custom-id=\"yQaxn8SXvvVv\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"mhXdd7AJ65ex\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-kRJu4\" data-uniq-id=\"k3iW_\" data-generated-css=\"brz-css-bfFAZ\"><span class=\"brz-cp-color5\">Proof by Contradiction<\/span><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"ab22507747af685d6ad3_dgULVcTL9oIK\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-kuz63j\" data-brz-custom-id=\"n3OCzpq1mfE8\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"c4QVC5NTlKC0\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"uROOnCx5Y_Zv\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"qLlidSovJxqE\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-fsft-lg-0 brz-fwdth-lg-100 brz-vfw-lg-400 brz-lh-lg-1 brz-ls-lg-0 brz-fw-lg-400 brz-fss-lg-px brz-fs-lg-18 brz-ft-adobe brz-ff-fields brz-css-j6aBx\" data-generated-css=\"brz-css-z9dvC\" data-uniq-id=\"b77OG\"><span class=\"brz-cp-color3\">Contradiction Proof 1<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"iSGm6H7SlY2s\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/h65sYq1rNro?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"acWhZD3e4Li8\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"mECPkaqVuvRN\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-nbjpB\" data-generated-css=\"brz-css-v0vz1\" data-uniq-id=\"yPlMg\"><strong class=\"brz-cp-color3\">Contradiction Proof 2<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"aQbQ9VAxXRRb\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/JI65_iBg4GE?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"3004d6bb4eb6b4ffa4be_lWMGUGuhNGu7\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-2eberx\" data-brz-custom-id=\"k54viOIaupax\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"gK8H5ogVefiX\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"z8eTYBsmWHL7\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"qgx_Zrmegsox\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-ff-fields brz-ft-adobe brz-fs-lg-18 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-0 brz-lh-lg-1 brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-tp-lg-subtitle brz-css-onuxB\" data-uniq-id=\"vICn1\" data-generated-css=\"brz-css-hZP_n\"><span class=\"brz-cp-color3\">Contradiction Proof 3<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"v0hoLgiCtorm\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/HtwRj1p0E88?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"aDcqOILHnduC\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"np1ErL4VIwGw\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-nkvGo\" data-uniq-id=\"kYrym\" data-generated-css=\"brz-css-g2wGr\"><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"cd499049981961bd64e0_glCX_j7Gzr9x\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-n6jjjj\" data-brz-custom-id=\"v33MXRniU7L0\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"iCBtkp_ACdav\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-d08Qr\" data-uniq-id=\"rYcQ8\" data-generated-css=\"brz-css-wUL8o\"><span class=\"brz-cp-color5\">Proof by Induction &#8211; Series<\/span><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"0f1402718c41e74c3018_w8HZFIiZSCAt\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-l330q8\" data-brz-custom-id=\"edZlAxFJnhSv\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"u936npm7fbzI\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"aDUu2GaVriUI\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"zQS0W_JJLL1g\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-fsft-lg-0 brz-fwdth-lg-100 brz-vfw-lg-400 brz-lh-lg-1 brz-ls-lg-0 brz-fw-lg-400 brz-fss-lg-px brz-fs-lg-18 brz-ft-adobe brz-ff-fields brz-css-jvxhx\" data-generated-css=\"brz-css-gSR68\" data-uniq-id=\"q0PvZ\"><span class=\"brz-cp-color3\">Induction Series 1<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"cjpgywTCnwmn\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/QGOTPGXwBX8?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"kHYe5krKiTPZ\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"plQNakA3JMj1\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-tBtlY\" data-generated-css=\"brz-css-mNJ_X\" data-uniq-id=\"ki4NJ\"><strong class=\"brz-cp-color3\">Induction Series 2<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"kJTJF28mrLLE\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/oJs_qYir9SY?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"132c52d77dd25d76cf2b_dvvN77lDgFO1\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1ckpdmt\" data-brz-custom-id=\"eJU5584gFWzO\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"qfIuOejYJaJ4\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-zjgj4\" data-generated-css=\"brz-css-rV2Xa\" data-uniq-id=\"otRBd\"><strong class=\"brz-cp-color5\">Proof by Induction &#8211; Division<\/strong><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"37d0bc48fb73a4f94a42_j8KsW_0B9GVw\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-8c66p7\" data-brz-custom-id=\"fWVjjTlvrxPK\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"vusCNg0LPiHK\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"vF2deiyfK7ap\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"aKMtCbXWEpzf\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-ff-fields brz-ft-adobe brz-fs-lg-18 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-0 brz-lh-lg-1 brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-tp-lg-subtitle brz-css-g7L_x\" data-uniq-id=\"e5Dln\" data-generated-css=\"brz-css-bYmCW\"><strong class=\"brz-cp-color3\">Induction Division 1<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"nYeWRu1aL5x9\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/eDtxWZvzvEg?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"fjQcxeiNSt9W\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"t4denhNiLQEd\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-xm979\" data-generated-css=\"brz-css-j2l62\" data-uniq-id=\"sswlY\"><strong class=\"brz-cp-color3\">Induction Division 2<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"rfuUthrkoFEs\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/UywDnMoKp7o?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"bd567884685a7672b9f6_rwYPsyQ2kCPJ\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1evzk2e\" data-brz-custom-id=\"jdKnApsYknd9\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"rF3cuxeekXxE\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"xVvY3J1UYLPi\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"wpK8Ttd_k1Nj\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-fsft-lg-0 brz-fwdth-lg-100 brz-vfw-lg-400 brz-lh-lg-1 brz-ls-lg-0 brz-fw-lg-400 brz-fss-lg-px brz-fs-lg-18 brz-ft-adobe brz-ff-fields brz-css-bS4oA\" data-generated-css=\"brz-css-bkvZK\" data-uniq-id=\"glrcU\"><strong class=\"brz-cp-color3\">Induction Division 3<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"aXXPOvraGDro\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/3s2tMgi1sX8?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"fGlKS_v843Ug\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"kmSc0yHEhWTc\">\n<div data-brz-translate-text=\"1\">\n<p class=\"brz-tp-lg-subtitle brz-css-u1wNB\" data-uniq-id=\"hNa2R\" data-generated-css=\"brz-css-kmPdA\"><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"0a765b45920d075a2b1f_fR232lNC62Pz\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1kc9tgm\" data-brz-custom-id=\"n4npU4WWrExI\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"nY4NnNIQCRkA\">\n<div data-brz-translate-text=\"1\">\n<h4 class=\"brz-tp-lg-heading4 brz-css-jWLmG\" data-generated-css=\"brz-css-djZys\" data-uniq-id=\"pUM7E\"><strong class=\"brz-cp-color5\">Proof by Induction &#8211; Other<\/strong><\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section id=\"08dc1eb119cae844144d_bvNuMYFizsEh\" class=\"brz-section brz-css-18algly\">\n<div class=\"brz-section__content brz-section--boxed brz-css-1insl1o brz-css-1j037mg\" data-brz-custom-id=\"wqSzYZod4wMh\">\n<div class=\"brz-bg\">\n<div class=\"brz-bg-color\"><\/div>\n<\/div>\n<div class=\"brz-container brz-css-1tuukqg\">\n<div class=\"brz-row__container brz-css-vh1af0\" data-brz-custom-id=\"mIKZ7pWmka4m\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-row brz-css-oh64gt brz-css-uzqveo\">\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"rApjK8R2TuCJ\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"qqLGb3elwkSH\">\n<div data-brz-translate-text=\"1\">\n<p data-uniq-id=\"lqH10\" data-generated-css=\"brz-css-gBQiH\" class=\"brz-ff-fields brz-ft-adobe brz-fs-lg-18 brz-fss-lg-px brz-fw-lg-400 brz-ls-lg-0 brz-lh-lg-1 brz-vfw-lg-400 brz-fwdth-lg-100 brz-fsft-lg-0 brz-tp-lg-subtitle brz-css-nT9Lb\"><span class=\"brz-cp-color3\">Vertical and Horizontal Lines<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"h7Wj82Cyg8iE\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/CG_ebNX-8xc?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"brz-columns brz-css-nwm167\" data-brz-custom-id=\"vYuxLvuYKwlg\">\n<div class=\"brz-bg\"><\/div>\n<div class=\"brz-column__items brz-css-1ryj74f\">\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-rich-text brz-rich-text__custom brz-css-1afp1ku\" data-brz-custom-id=\"rxBaL0hgtSeE\">\n<div data-brz-translate-text=\"1\">\n<p data-generated-css=\"brz-css-lihYW\" data-uniq-id=\"wAlFq\" class=\"brz-tp-lg-subtitle brz-css-j_O5p\"><span class=\"brz-cp-color3\">Plotting Diagonal Lines<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"\" class=\"brz-css-zpoo1i brz-wrapper\">\n<div class=\"brz-video brz-youtube-video brz-video-on-controls-hidden brz-css-19w0er\" data-brz-custom-id=\"esmDGCrqOdaS\">\n<div class=\"brz-video-content\" data-loop=\"false\" data-muted=\"false\" data-autoplay=\"off\">\n<div class=\"video-wrapper brz-image-fix-16-9\">\n<div class=\"brz-video-data brz-hidden\" data-src=\"https:\/\/www.youtube.com\/embed\/x7poiaAMH7Y?autoplay=0&amp;controls=1&amp;start=0&amp;end=0&amp;modestbranding=0&amp;wmode=transparent&amp;enablejsapi=1&amp;loop=0&amp;rel=0&amp;mute=0\" data-population=\"\" data-controls=\"true\" data-branding=\"true\" data-intro=\"true\" data-start=\"0\" data-end=\"0\" data-loop=\"false\" data-autoplay=\"off\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<p>    <!-- version:1739970557 --><\/p>\n","protected":false},"excerpt":{"rendered":"<p>04 AA HL &#8211; Proof Table of Contents Direct Proof Direct Proof 1 Direct Proof 2 Direct Proof 3 Proof by Contrapositive Contrapositive Proof 1 Contrapositive Proof 2 Contrapositive Proof 3 Proof by Contradiction Contradiction Proof 1 Contradiction Proof 2<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":15911,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"brizy-blank-template.php","meta":{"footnotes":""},"class_list":["post-15979","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.10 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>HLAA4 - ibmaths<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HLAA4 - ibmaths\" \/>\n<meta property=\"og:description\" content=\"04 AA HL &#8211; Proof Table of Contents Direct Proof Direct Proof 1 Direct Proof 2 Direct Proof 3 Proof by Contrapositive Contrapositive Proof 1 Contrapositive Proof 2 Contrapositive Proof 3 Proof by Contradiction Contradiction Proof 1 Contradiction Proof 2\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/\" \/>\n<meta property=\"og:site_name\" content=\"ibmaths\" \/>\n<meta property=\"article:modified_time\" content=\"2025-02-19T13:09:17+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/\",\"url\":\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/\",\"name\":\"HLAA4 - ibmaths\",\"isPartOf\":{\"@id\":\"https:\/\/ibmaths.com\/#website\"},\"datePublished\":\"2024-12-25T17:18:23+00:00\",\"dateModified\":\"2025-02-19T13:09:17+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ibmaths.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"IBAAHL\",\"item\":\"https:\/\/ibmaths.com\/ibaahl\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"HLAA4\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/ibmaths.com\/#website\",\"url\":\"https:\/\/ibmaths.com\/\",\"name\":\"ibmaths\",\"description\":\"Just another WordPress site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/ibmaths.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"HLAA4 - ibmaths","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/","og_locale":"en_US","og_type":"article","og_title":"HLAA4 - ibmaths","og_description":"04 AA HL &#8211; Proof Table of Contents Direct Proof Direct Proof 1 Direct Proof 2 Direct Proof 3 Proof by Contrapositive Contrapositive Proof 1 Contrapositive Proof 2 Contrapositive Proof 3 Proof by Contradiction Contradiction Proof 1 Contradiction Proof 2","og_url":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/","og_site_name":"ibmaths","article_modified_time":"2025-02-19T13:09:17+00:00","twitter_card":"summary_large_image","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/","url":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/","name":"HLAA4 - ibmaths","isPartOf":{"@id":"https:\/\/ibmaths.com\/#website"},"datePublished":"2024-12-25T17:18:23+00:00","dateModified":"2025-02-19T13:09:17+00:00","breadcrumb":{"@id":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ibmaths.com\/ibaahl\/hlaa4\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/ibmaths.com\/ibaahl\/hlaa4\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ibmaths.com\/"},{"@type":"ListItem","position":2,"name":"IBAAHL","item":"https:\/\/ibmaths.com\/ibaahl\/"},{"@type":"ListItem","position":3,"name":"HLAA4"}]},{"@type":"WebSite","@id":"https:\/\/ibmaths.com\/#website","url":"https:\/\/ibmaths.com\/","name":"ibmaths","description":"Just another WordPress site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ibmaths.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/pages\/15979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/comments?post=15979"}],"version-history":[{"count":5,"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/pages\/15979\/revisions"}],"predecessor-version":[{"id":16853,"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/pages\/15979\/revisions\/16853"}],"up":[{"embeddable":true,"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/pages\/15911"}],"wp:attachment":[{"href":"https:\/\/ibmaths.com\/wp-json\/wp\/v2\/media?parent=15979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}