{"common":{"save":0,"post_id":"7832","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7693","post_id":"7832","mon_id":"1159278","chapter_id":"1159327","question":"<p>Ch\u1ecdn \u0111&aacute;p &aacute;n <strong>\u0111&uacute;ng<\/strong>:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\sqrt{9}=\\pm3$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\sqrt{1,44}=-1,2$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\sqrt{\\dfrac{16}{9}}=\\dfrac{4}{3}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\sqrt{5^2-4^2}=5-4$<\/span>"],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$\\sqrt{\\dfrac{16}{9}}=\\dfrac{4}{3}$<\/span><\/span><\/p><p><strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$\\sqrt{9}=\\pm3$<\/span>&nbsp;sai v&igrave;&nbsp;<span class=\"math-tex\">$\\sqrt{9}=3$<\/span><\/p><p><strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$\\sqrt{1,44}=-1,2$<\/span>&nbsp;sai v&igrave;&nbsp;<span class=\"math-tex\">$\\sqrt{1,44}=1,2$<\/span><\/p><p><strong>D.<\/strong>&nbsp;<span class=\"math-tex\">$\\sqrt{5^2-4^2}=5-4$<\/span>&nbsp;sai v&igrave;&nbsp;<span class=\"math-tex\">$\\sqrt{5^2-4^2}=\\sqrt{9}=3$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 02:31:02","option_type":"math","len":0},{"id":"7694","post_id":"7832","mon_id":"1159278","chapter_id":"1159327","question":"<p>Ch\u1ecdn \u0111&aacute;p &aacute;n <strong>\u0111&uacute;ng<\/strong>:<\/p>","options":["<strong>A.<\/strong> C\u0103n b\u1eadc hai c\u1ee7a 0,18 v&agrave; 0,9.","<strong>B.<\/strong> C\u0103n b\u1eadc hai c\u1ee7a 3,24 v&agrave; &ndash;1,8.","<strong>C.<\/strong> C\u0103n b\u1eadc hai c\u1ee7a &ndash;225 v&agrave; &ndash;15.","<strong>D.<\/strong> C\u0103n b\u1eadc hai c\u1ee7a 0,49 v&agrave; <span class=\"math-tex\">$\\pm$<\/span>0,7."],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.<\/strong>&nbsp;C\u0103n b\u1eadc hai c\u1ee7a 0,49 v&agrave; <span class=\"math-tex\">$\\pm$<\/span>0,7.<\/span><\/p><p>S\u1ed1 d\u01b0\u01a1ng A c&oacute; \u0111&uacute;ng hai c\u0103n b\u1eadc hai l&agrave; hai s\u1ed1 \u0111\u1ed1i nhau \u0111&oacute; l&agrave;&nbsp;<span class=\"math-tex\">$\\sqrt{A}$<\/span>&nbsp;(s\u1ed1 d\u01b0\u01a1ng) v&agrave;&nbsp;<span class=\"math-tex\">$-\\sqrt{A}$<\/span>&nbsp;(s\u1ed1 &acirc;m).<\/p><p>V&igrave; v\u1eady c&aacute;c k\u1ebft lu\u1eadn A, B, C \u0111\u1ec1u sai.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 02:33:47","option_type":"math","len":0},{"id":"7695","post_id":"7832","mon_id":"1159278","chapter_id":"1159327","question":"<p>C\u0103n b\u1eadc hai s\u1ed1 h\u1ecdc c\u1ee7a&nbsp;<span class=\"math-tex\">$\\dfrac{4}{9}$<\/span> l&agrave;:<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{3}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$-\\dfrac{2}{3}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{3}{2}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$-\\dfrac{3}{2}$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$\\dfrac{2}{3}$<\/span><\/span><\/p><p>C\u0103n b\u1eadc hai s\u1ed1 h\u1ecdc c\u1ee7a&nbsp;<span class=\"math-tex\">$\\dfrac{4}{9}$<\/span> l&agrave;:&nbsp;<span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{2}{3}$<\/span><\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-13 02:35:36","option_type":"math","len":0}]}