{"save":1,"level":1,"time":"90","total":34,"point":5,"segment":[{"id":"4520","test_id":"517","question":"<p>T\u1ea5t c\u1ea3 c&aacute;c nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng tr&igrave;nh&nbsp;<span class=\"math-tex\">$sinx=0$<\/span>&nbsp;l&agrave;&nbsp;<br \/>&nbsp;<\/p>","options":["A.&nbsp;<span class=\"math-tex\">$x = \\dfrac{\\pi}{2} + k\\pi, \\, k \\in \\mathbb{Z}$<\/span>","B.&nbsp;<span class=\"math-tex\">$x = k2\\pi, \\, k \\in \\mathbb{Z}$<\/span>","C.&nbsp;<span class=\"math-tex\">$x = \\pi + k2\\pi, \\, k \\in \\mathbb{Z}$<\/span>","D.&nbsp;<span class=\"math-tex\">$x = k\\pi, \\, k \\in \\mathbb{Z}$<\/span>"],"correct":"4","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave; :<span style=\"color:#27ae60;\"><strong> D.&nbsp;<span class=\"math-tex\">$x = k\\pi, \\, k \\in \\mathbb{Z}$<\/span><\/strong><\/span><\/p><p>&nbsp;<\/p>","type":"choose","user_id":"156","test":"1","date":"2025-06-04 16:28:48"},{"id":"4521","test_id":"517","question":"<p>Trong kh&ocirc;ng gian Oxyz , cho hai \u0111i\u1ec3m A(1; 2; 3), B(-2; 4; 0) . Trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB c&oacute; tung \u0111\u1ed9 l&agrave;<\/p>","options":["A. 1","B. 3","C. 2","D. -1&nbsp;"],"correct":"2","answer":"<p>\u0110&aacute;p &aacute;n \u0111&uacute;ng l&agrave; :&nbsp;<strong><span style=\"color:#27ae60;\">B. 3<\/span><\/strong><\/p><p>G\u1ecdi I l&agrave; trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB . Khi \u0111&oacute;&nbsp;<span class=\"math-tex\">$y_I = \\dfrac{y_{A} + y_B}{2} = \\dfrac{2 + 4}{2} = 3$<\/span><br \/>&nbsp;<\/p>","type":"choose","user_id":"156","test":"1","date":"2025-06-04 16:31:36"}]}