{"save":1,"level":1,"time":"90","total":34,"point":5,"segment":[{"id":"3652","test_id":"485","question":"<p>Trong kh&ocirc;ng gian v\u1edbi h\u1ec7 t\u1ecda \u0111\u1ed9&nbsp;<span class=\"math-tex\">$Oxyz$<\/span>&nbsp;, kho\u1ea3ng c&aacute;ch t\u1eeb \u0111i\u1ec3m <span class=\"math-tex\">$A(3;-2;4)$<\/span>&nbsp;\u0111\u1ebfn m\u1eb7t ph\u1eb3ng <span class=\"math-tex\">$(Oxz)$<\/span>&nbsp;b\u1eb1ng:<\/p>","options":["A. 4","B. 5","C. 3","D. 2"],"correct":"4","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;: <span style=\"color:#16a085;\"><strong>D. 2.<\/strong><\/span><\/p><p>M\u1eb7t ph\u1eb3ng (Oxz) c&oacute; ph\u01b0\u01a1ng tr&igrave;nh l&agrave; y = 0.<\/p><p>Kho\u1ea3ng c&aacute;ch t\u1eeb \u0111i\u1ec3m A(3;&ndash;2;4) \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (Oxz) l&agrave;:&nbsp;<span class=\"math-tex\">$\\dfrac{|-2|}{1}=2$<\/span>.<\/p>","type":"choose","user_id":"126","test":"1","date":"2025-04-25 15:56:24"},{"id":"3653","test_id":"485","question":"<p>Nguy&ecirc;n h&agrave;m c\u1ee7a h&agrave;m s\u1ed1 <span class=\"math-tex\">$2x+\\cos x$<\/span> l&agrave;:<\/p>","options":["<strong>A.<\/strong>&nbsp;<span class=\"math-tex\">$x^2+\\sin x+C$<\/span>","<strong>B.<\/strong>&nbsp;<span class=\"math-tex\">$2x+\\sin x+C$<\/span>","<strong>C.<\/strong>&nbsp;<span class=\"math-tex\">$2x-\\sin x+C$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$x^2-\\sin x+C$<\/span>"],"correct":"1","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave;:&nbsp;<span style=\"color:#16a085;\"><strong>A.&nbsp;<span class=\"math-tex\">$x^2+\\sin x+C$<\/span>.<\/strong><\/span><\/p><p>Ta c&oacute;&nbsp;<span class=\"math-tex\">$\\int(2x+\\cos x)dx=x^2+\\sin x+C$<\/span>.<\/p>","type":"choose","user_id":"126","test":"1","date":"2025-04-25 15:59:32"}]}