{"common":{"save":0,"post_id":"7792","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7352","post_id":"7792","mon_id":"1159278","chapter_id":"1159282","question":"<p>S\u1ed1 nguy&ecirc;n nh\u1ecf nh\u1ea5t th\u1ecfa m&atilde;n b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh&nbsp;<span style=\"color:#2980b9;\"><span class=\"math-tex\">$x(5x+1)+4(x+3)&gt;5x^2$<\/span><\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> x = &ndash;3","<strong>B.<\/strong> x = 0","<strong>C.<\/strong> x = &ndash;1","<strong>D.<\/strong> x = &ndash;2"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;x&nbsp;=&nbsp;&ndash;2<\/span><\/p><p><span class=\"math-tex\">$x(5x+1)+4(x+3)&gt;5x^2$<\/span><\/p><p><span class=\"math-tex\">$5x^2+5x+12-5x^2&gt;0$<\/span><\/p><p><span class=\"math-tex\">$5x&gt;-12$<\/span><\/p><p><span class=\"math-tex\">$x&gt;-2,4$<\/span><\/p><p>V\u1eady s\u1ed1 nguy&ecirc;n nh\u1ecf nh\u1ea5t th\u1ecfa m&atilde;n b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh l&agrave; <span style=\"color:#16a085;\"><strong>x = &ndash;2<\/strong><\/span>.<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-10-06 09:11:02","option_type":"txt","len":0},{"id":"7354","post_id":"7792","mon_id":"1159278","chapter_id":"1159282","question":"<p>Nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh <span style=\"color:#c0392b;\"><span class=\"math-tex\">$(x+5)(x+6)&gt;(x+2)(x-2)$<\/span><\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$x&gt;\\dfrac{-26}{11}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$x&lt;\\dfrac{-34}{11}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$x&lt;\\dfrac{-26}{11}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x&gt;\\dfrac{-34}{11}$<\/span>"],"correct":"4","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$x&gt;\\dfrac{-34}{11}$<\/span><\/span><\/p><p><span class=\"math-tex\">$(x+5)(x+6)&gt;(x+2)(x-2)$<\/span><\/p><p><span class=\"math-tex\">$x^2+11x+30&gt;x^2-4$<\/span><\/p><p><span class=\"math-tex\">$11x&gt;-34$<\/span><\/p><p><span class=\"math-tex\">$x&gt;\\dfrac{-34}{11}$<\/span><\/p><p>V\u1eady nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh l&agrave;&nbsp;<span class=\"math-tex\">$x&gt;\\dfrac{-34}{11}$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-06 09:14:28","option_type":"math","len":0},{"id":"7355","post_id":"7792","mon_id":"1159278","chapter_id":"1159282","question":"<p>T\u1eadp nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh&nbsp;<span class=\"math-tex\">$\\dfrac{x^2+5}{x-3} \\le 0$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> x &lt; 3","<strong>B.<\/strong> x &ge; 3","<strong>C.<\/strong> x &gt; 3","<strong>D.<\/strong> x &le; 3"],"correct":"1","level":"3","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;x &lt; 3<\/span><\/p><p>Ta c&oacute;:&nbsp;<span class=\"math-tex\">$\\dfrac{x^2+5}{x-3} \\le 0$<\/span>&nbsp;(\u0111k:&nbsp;x &ne; 3)<\/p><p>V&igrave; x&sup2; + 5 &ge; 0 v\u1edbi m\u1ecdi&nbsp;x&nbsp;&isin;&nbsp;\u211d n&ecirc;n x&nbsp;&ndash; 3 &lt; 0 suy ra x &lt; 3.<\/p><p>V\u1eady nghi\u1ec7m c\u1ee7a b\u1ea5t ph\u01b0\u01a1ng tr&igrave;nh l&agrave; x &lt; 3.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-06 09:18:16","option_type":"txt","len":1}]}