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

{"save":1,"level":1,"time":"15","total":10,"point":5,"segment":[{"id":"358","test_id":"246","question":"<p>C&acirc;u 1: Trong kh&ocirc;ng gian Oxyz, cho hai \u0111i&ecirc;\u0309m <span class=\"math-tex\">$A\\left( 1;\\,1;\\,-1\\, \\right),B\\left( 2;\\,3;\\,2 \\right)$<\/span>.<\/p><p>Vect\u01a1&nbsp;&nbsp;<span class=\"math-tex\">$\\overrightarrow{AB}$<\/span>&nbsp; &nbsp;co\u0301 to\u0323a \u0111&ocirc;\u0323 la\u0300 :<br \/>&nbsp;<\/p>","options":["<span class=\"math-tex\">$\\left( 3;\\,4;\\,1 \\right)$<\/span>","<span class=\"math-tex\">$\\left( 3;\\,5;\\,1 \\right)$<\/span>","<span class=\"math-tex\">$ \\left( -1;\\,-2;\\,3 \\right)$<\/span>","<span class=\"math-tex\">$\\left( 1;\\,2;\\,3 \\right)$<\/span>"],"correct":"1","answer":"<p><span class=\"math-tex\">$A\\left( 1;\\,1;\\,-1\\, \\right); B\\left( 2;\\,3;\\,2 \\right)$<\/span><\/p><p><span class=\"math-tex\">$\\overrightarrow{AB}=(1;2;3)$<\/span>&nbsp;<\/p>","type":"choose","user_id":"108","test":"2","date":"2020-03-16 19:29:25"},{"id":"359","test_id":"246","question":"<p>Trong kh&ocirc;ng gian Oxyz, cho m\u1eb7t &nbsp;c\u1ea7u <span class=\"math-tex\">$\\left( S \\right):{{(x+1)}^{2}}~+{{(y-2)}^{2}}+{{(z-1)}^{2}}=9$<\/span>&nbsp;<\/p><p>T&igrave;m t\u1ecda \u0111\u1ed9 t&acirc;m I v&agrave; t&iacute;nh b&aacute;n k&iacute;nh R c\u1ee7a (S).<br \/>&nbsp;<\/p>","options":["<span class=\"math-tex\">$I\\left( 1;2;1 \\right)\\text{ }v\\grave{a}\\,\\,R=9$<\/span>","<span class=\"math-tex\">$I\\left( 1;\\text{ }2;\\text{ }1 \\right)\\text{ }v\\grave{a}\\,\\,R=9$<\/span>","<span class=\"math-tex\">$I\\left( 1;2;1 \\right)\\text{ }v\\grave{a}\\,\\,R=3$<\/span>","<span class=\"math-tex\">$I\\left( 1;\\text{ }2;\\text{ }1 \\right)\\text{ }v\\grave{a}\\,\\,R=3$<\/span>"],"correct":"4","answer":"<p><span class=\"math-tex\">$I (1; 2; 3) ; R = \\sqrt{9}= 3$<\/span><\/p>","type":"choose","user_id":"108","test":"0","date":"2020-03-16 19:33:25"}]}