{"common":{"save":0,"post_id":"6183","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5330","mon_id":"1158767","chapter_id":"1158801","post_id":"6183","question":"<p>H&agrave;m s\u1ed1&nbsp;&nbsp;<span class=\"math-tex\">$y=ax^2+bx+c$<\/span>&nbsp; c&oacute; \u0111\u1ed3 th\u1ecb h&agrave;m s\u1ed1 nh\u01b0 h&igrave;nh v\u1ebd d\u01b0\u1edbi \u0111&acirc;y. X&eacute;t d\u1ea5u c\u1ee7a h\u1ec7 s\u1ed1 a.<\/p><p><span class=\"svgedit\"><svg height=\"200\" width=\"250\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"202\" id=\"canvas_background\" width=\"252\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_8\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><g id=\"svg_7\"> <g id=\"svg_3\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"91\" x2=\"91\" y1=\"-23.75\" y2=\"233.25\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 92.0104217529297,6.249999999999994) \" x=\"85\" xml:space=\"preserve\" y=\"14.25\">&gt;<\/text> <\/g> <g id=\"svg_6\" stroke=\"null\" transform=\"rotate(90 126.5104293823242,138.22845458984378) \"> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"126.02155\" x2=\"126.02155\" y1=\"-13.77154\" y2=\"290.22845\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0,-1.1828793287277222,1,0,210.7604217529297,226.9588146260303) \" x=\"166.50176\" xml:space=\"preserve\" y=\"-75.72845\">&gt;<\/text> <\/g> <\/g> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"70\" xml:space=\"preserve\" y=\"159.25\">O<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"101\" xml:space=\"preserve\" y=\"22.25\">y<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"231\" xml:space=\"preserve\" y=\"161.25\">x<\/text> <path fill=\"#fff\" id=\"svg_12\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_13\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_14\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_15\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_16\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_17\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_18\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_19\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_20\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_22\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_23\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path fill=\"#fff\" id=\"svg_25\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <path d=\"m73,28.25c22.66667,87.87735 61.33333,156.7199 107,4.7587\" fill=\"none\" id=\"svg_21\" stroke=\"#ff0000\" stroke-width=\"1.5\"><\/path> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> a &gt; 0","<strong>B.<\/strong> a &lt; 0"],"correct":"1","level":"1","hint":"","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> a &gt; 0<\/span><\/p>","type":"choose","extra_type":"shape2","user_id":"131","test":"0","date":"2022-09-03 05:29:20","option_type":"txt","len":0},{"id":"5332","mon_id":"1158767","chapter_id":"1158801","post_id":"6183","question":"<p>H&agrave;m s\u1ed1&nbsp;<span class=\"math-tex\">$y = ax^2 + bx + c$<\/span>&nbsp; c&oacute; \u0111\u1ed3 th\u1ecb h&agrave;m s\u1ed1 nh\u01b0 h&igrave;nh v\u1ebd d\u01b0\u1edbi \u0111&acirc;y. X&eacute;t d\u1ea5u c\u1ee7a h\u1ec7 s\u1ed1 a.<\/p><p><span class=\"svgedit\"><svg height=\"200\" width=\"250\"> <g>&lt;title&gt;&lt;\/title><rect fill=\"#fff\" height=\"202\" id=\"canvas_background\" width=\"252\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_12\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>&lt;title&gt;&lt;\/title><g id=\"svg_7\"> <g id=\"svg_3\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-68\" x2=\"299\" y1=\"113.25\" y2=\"113\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"238\" xml:space=\"preserve\" y=\"121.25\">&gt;<\/text> <\/g> <g id=\"svg_6\" transform=\"rotate(-90 103.50000000000004,135.25000000000003) \"> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"-80\" x2=\"287\" y1=\"135.25\" y2=\"135\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"226\" xml:space=\"preserve\" y=\"143.25\">&gt;<\/text> <\/g> <\/g> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"81\" xml:space=\"preserve\" y=\"139.25\">O<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"228\" xml:space=\"preserve\" y=\"139.25\">x<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"82\" xml:space=\"preserve\" y=\"22.25\">y<\/text> <path d=\"m55,218.25l130,-0.38056c-73.33333,-324.11 -101.66667,-139.79225 -130,0.38056z\" fill=\"none\" id=\"svg_11\" stroke=\"#ff0000\" stroke-width=\"1.5\"><\/path> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> a &gt; 0","<strong>B.<\/strong> a &lt; 0"],"correct":"2","level":"1","hint":"","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong> a &lt; 0<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-03 05:42:45","option_type":"txt","len":1},{"id":"5334","mon_id":"1158767","chapter_id":"1158801","post_id":"6183","question":"<p>H&agrave;m s\u1ed1&nbsp;<span class=\"math-tex\">$y=ax^2+bx+c$<\/span>&nbsp; (a &lt; 0) \u0111\u1ed3ng bi\u1ebfn trong kho\u1ea3ng n&agrave;o sau \u0111&acirc;y?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\left( - \\dfrac{b}{2a} ; + \\infty \\right)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\left( -\\infty ; - \\dfrac{ \\Delta }{4a} \\right)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\left( - \\dfrac{\\Delta}{4a} ; + \\infty \\right)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\left( -\\infty ; - \\dfrac{b}{2a} \\right)$<\/span>"],"correct":"4","level":"1","hint":"","answer":"<p>V&igrave; a &lt; 0 n&ecirc;n h&agrave;m s\u1ed1 \u0111\u1ed3ng bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;&nbsp;<span class=\"math-tex\">$\\left( -\\infty ; - \\dfrac{b}{2a} \\right)$<\/span>&nbsp;v&agrave; ngh\u1ecbch bi\u1ebfn tr&ecirc;n kho\u1ea3ng&nbsp;<span class=\"math-tex\">$\\left( - \\dfrac{b}{2a} ; + \\infty \\right)$<\/span>&nbsp; (b\u1ea3ng bi\u1ebfn thi&ecirc;n trong h&igrave;nh v\u1ebd d\u01b0\u1edbi).<\/p><p><span class=\"svgedit\"><svg height=\"140\" width=\"290\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g> &lt;title&gt;&lt;\/title&gt; <rect fill=\"#fff\" height=\"142\" id=\"canvas_background\" width=\"292\" 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y=\"1.5\"><\/image> <\/g> <\/svg><\/span><\/p><p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;&nbsp; &nbsp;<span style=\"color:#16a085;\"><strong>D.&nbsp;<\/strong><span class=\"math-tex\">$\\left( -\\infty ; - \\dfrac{b}{2a} \\right)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2022-09-03 05:57:43","option_type":"math","len":0}]}