Toán lớp 12 - Đề kiểm tra 15 phút - Toán lớp 12 - Tháng 11 - Số 1

{"save":1,"level":1,"time":"15","total":10,"point":5,"segment":[{"id":"335","test_id":"242","question":"<p>Th\u1ec3 t&iacute;ch c\u1ee7a h&igrave;nh ch&oacute;p c&oacute; chi\u1ec1u cao h, di\u1ec7n t&iacute;ch \u0111&aacute;y b\u1eb1ng B l&agrave;:<\/p>","options":["<span class=\"math-tex\">$Bh$<\/span>","<span class=\"math-tex\">$\\frac{1}{2}Bh$<\/span>","<span class=\"math-tex\">$\\frac{1}{3}Bh$<\/span>","<span class=\"math-tex\">$\\frac{1}{4}Bh$<\/span>"],"correct":"3","answer":"<p>C&ocirc;ng th\u1ee9c t&iacute;nh th\u1ec3 t&iacute;ch h&igrave;nh ch&oacute;p&nbsp;<span class=\"math-tex\">$V=\\frac{1}{3}Bh$<\/span><\/p>","type":"choose","user_id":"108","test":"2","date":"2020-03-15 19:50:03"},{"id":"336","test_id":"242","question":"<p>Cho h&igrave;nh ch&oacute;p t\u1ee9 gi&aacute;c S. ABCD c&oacute; \u0111&aacute;y ABCD l&agrave; h&igrave;nh vu&ocirc;ng c\u1ea1nh a, c\u1ea1nh b&ecirc;n SA vu&ocirc;ng g&oacute;c v\u1edbi \u0111&aacute;y, SA = <span class=\"math-tex\">$\\sqrt{2}a$<\/span>.<\/p><p>T&iacute;nh th\u1ec3 t&iacute;ch kh\u1ed1i ch&oacute;p.<\/p>","options":["<span class=\"math-tex\">$\\frac{\\sqrt{6}}{2}{{a}^{3}}$<\/span>","<span class=\"math-tex\">$\\frac{\\sqrt{6}}{4}{{a}^{3}}$<\/span>","<span class=\"math-tex\">$\\frac{\\sqrt{2}}{3}{{a}^{3}}$<\/span>","<span class=\"math-tex\">$\\sqrt{2}{{a}^{3}}$<\/span>"],"correct":"3","answer":"<p><span>&nbsp;S(ABCD) = a<sup>2<\/sup><\/span><\/p><p><span>V&igrave; SA vu&ocirc;ng g&oacute;c v\u1edbi mp(ABCB) <\/span><\/p><p><font face=\"Times New Roman, serif\">n&ecirc;n V(S.ABCD) = <\/font><span class=\"math-tex\">$\\frac{1}{3}$<\/span><font face=\"Times New Roman, serif\">SA.S(ABCD) = <\/font><span class=\"math-tex\">$\\frac{1}{3}$<\/span><span class=\"math-tex\">$\\sqrt{2}a^3$<\/span><\/p>","type":"choose","user_id":"108","test":"0","date":"2020-03-15 19:53:05"}]}