{"common":{"save":0,"post_id":"7800","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7451","post_id":"7800","mon_id":"1159278","chapter_id":"1159327","question":"<p>K\u1ebft qu\u1ea3 c\u1ee7a bi\u1ec3u th\u1ee9c: M =&nbsp;<span class=\"math-tex\">$\\sqrt{(\\sqrt{7}-5)^2}+\\sqrt{(2-\\sqrt{7})^2}$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> 3","<strong>B.<\/strong> 7","<strong>C.<\/strong> 2","<strong>D.<\/strong> 5"],"correct":"1","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong> 3.<\/span><\/p><p>M =&nbsp;<span class=\"math-tex\">$\\sqrt{(\\sqrt{7}-5)^2}+\\sqrt{(2-\\sqrt{7})^2}$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$|\\sqrt{7}-5|+|2-\\sqrt{7}|$<\/span><\/p><p>=&nbsp;<span class=\"math-tex\">$5-\\sqrt{7}+\\sqrt{7}-2$<\/span><\/p><p>= 3.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-08 02:48:09","option_type":"txt","len":0},{"id":"7452","post_id":"7800","mon_id":"1159278","chapter_id":"1159327","question":"<p>R&uacute;t g\u1ecdn&nbsp;<span class=\"math-tex\">$P=\\sqrt{(1-\\sqrt{3})^2}-\\sqrt{(1+\\sqrt{3})^2}$<\/span>&nbsp;\u0111\u01b0\u1ee3c<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$2\\sqrt{3}$<\/span>","<strong>B.<\/strong> &ndash;<span class=\"math-tex\">$2\\sqrt{3}$<\/span>","<strong>C.<\/strong> &ndash;2","<strong>D.<\/strong> 2"],"correct":"3","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong>&nbsp;&ndash;2.<\/span><\/p><p><span class=\"math-tex\">$P=\\sqrt{(1-\\sqrt{3})^2}-\\sqrt{(1+\\sqrt{3})^2}$<\/span><\/p><p><span class=\"math-tex\">$=|1-\\sqrt{3}|-|1+\\sqrt{3}|$<\/span><\/p><p><span class=\"math-tex\">$=\\sqrt{3}-1-1-\\sqrt{3}$<\/span><\/p><p><span class=\"math-tex\">$=-2$<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-08 02:52:54","option_type":"math","len":0},{"id":"7453","post_id":"7800","mon_id":"1159278","chapter_id":"1159327","question":"<p>K\u1ebft qu\u1ea3 khi r&uacute;t g\u1ecdn bi\u1ec3u th\u1ee9c A =&nbsp;<span class=\"math-tex\">$\\sqrt{(\\sqrt{5}-3)^2}+\\sqrt{(2-\\sqrt{5})^2}-1$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> 5","<strong>B.<\/strong> 0","<strong>C.<\/strong> <span class=\"math-tex\">$2\\sqrt{5}$<\/span>","<strong>D.<\/strong> 4"],"correct":"2","level":"2","hint":"","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong> 0.<\/span><\/p><p>A&nbsp;<span class=\"math-tex\">$=\\sqrt{(\\sqrt{5}-3)^2}+\\sqrt{(2-\\sqrt{5})^2}-1$<\/span><\/p><p><span class=\"math-tex\">$=|\\sqrt{5}-3|+|2-\\sqrt{5}|-1$<\/span><\/p><p><span class=\"math-tex\">$=3-\\sqrt{5}+\\sqrt{5}-2-1$<\/span><\/p><p><span class=\"math-tex\">$=0$<\/span>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-08 02:59:25","option_type":"math","len":0}]}