{"common":{"save":0,"post_id":"7583","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5553","post_id":"7583","mon_id":"1159285","chapter_id":"1159392","question":"<p>Trong kh&ocirc;ng gian v\u1edbi h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 Oxyz.&nbsp;T\u1ecda \u0111\u1ed9 c\u1ee7a vect\u01a1&nbsp;<span class=\"math-tex\">$\\overrightarrow{j}$<\/span>&nbsp;l&agrave;<\/p>","options":["<strong>A.<\/strong> (1; 1; 1)","<strong>B.<\/strong> (1; 0; 1)","<strong>C.<\/strong> (0; 1; 0)","<strong>D.<\/strong> (1; 1; 0)"],"correct":"3","level":"1","hint":"<p>S\u1eed d\u1ee5ng tr\u1ee5c Oy: tr\u1ee5c tung, c&oacute; vect\u01a1 \u0111\u01a1n v\u1ecb&nbsp;<span class=\"math-tex\">$\\overrightarrow{j}=(0;1;0)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong> (0; 1; 0)<\/span><\/p><p><span class=\"math-tex\">$\\overrightarrow{j}=0\\overrightarrow{i}+1\\overrightarrow{j}+0\\overrightarrow{k}$<\/span>&nbsp;&hArr;&nbsp;<span class=\"math-tex\">$\\overrightarrow{j}=(0;1;0)$<\/span><\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2024-09-01 01:08:17","option_type":"txt","len":0},{"id":"5554","post_id":"7583","mon_id":"1159285","chapter_id":"1159392","question":"<p>Trong kh&ocirc;ng gian v\u1edbi h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 Oxyz. T\u1ecda \u0111\u1ed9 c\u1ee7a vect\u01a1&nbsp;<span class=\"math-tex\">$-5\\overrightarrow{k}$<\/span>&nbsp;l&agrave;:<\/p>","options":["<strong>A.<\/strong> (0; 0; &ndash;5)","<strong>B.<\/strong> (&ndash;5; &ndash;5; 0)","<strong>C.<\/strong> (&ndash;5; &ndash;5; &ndash;5)","<strong>D.<\/strong> (&ndash;5; 0; &ndash;5)"],"correct":"1","level":"1","hint":"<p>Tr\u1ee5c Oz c&oacute; vect\u01a1 \u0111\u01a1n v\u1ecb l&agrave;&nbsp;<span class=\"math-tex\">$\\overrightarrow{k}=(0;0;1)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;(0; 0; &ndash;5)<\/span><\/p>","type":"choose","extra_type":"shape1","user_id":"131","test":"0","date":"2024-09-01 01:09:17","option_type":"txt","len":0},{"id":"5555","post_id":"7583","mon_id":"1159285","chapter_id":"1159392","question":"<p>Trong kh&ocirc;ng gian Oxyz, cho \u0111i\u1ec3m A(&ndash;2; 3; 5). T\u1ecda \u0111\u1ed9 c\u1ee7a v&eacute;ct\u01a1&nbsp;<span class=\"math-tex\">$\\overrightarrow{OA}$<\/span>&nbsp;l&agrave;:<\/p>","options":["<strong>A.<\/strong> (&ndash;2; 3; 5)","<strong>B.<\/strong> (2; &ndash;3; 5)","<strong>C.<\/strong> (&ndash;2; &ndash;3; 5)","<strong>D.<\/strong> (2; &ndash;3; &ndash;5)"],"correct":"1","level":"1","hint":"<p>S\u1eed d\u1ee5ng c&ocirc;ng th\u1ee9c M(x; y; z)&nbsp;&hArr;&nbsp;<span class=\"math-tex\">$\\overrightarrow{OM}=(x;y;z)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.<\/strong>&nbsp;(&ndash;2; 3; 5)<\/span><\/p><p>A(&ndash;2; 3; 5)&nbsp;&hArr;&nbsp;<span class=\"math-tex\">$\\overrightarrow{OA}=(-2;3;5)$<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-09-01 01:15:29","option_type":"txt","len":2}]}