{"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 không gian v\u1edbi h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 Oxyz. T\u1ecda \u0111\u1ed9 c\u1ee7a vect\u01a1 <span class=\"math-tex\">$\\overrightarrow{j}$<\/span> là<\/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, có vect\u01a1 \u0111\u01a1n v\u1ecb <span class=\"math-tex\">$\\overrightarrow{j}=(0;1;0)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn <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> ⇔ <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 không gian v\u1edbi h\u1ec7 tr\u1ee5c t\u1ecda \u0111\u1ed9 Oxyz. T\u1ecda \u0111\u1ed9 c\u1ee7a vect\u01a1 <span class=\"math-tex\">$-5\\overrightarrow{k}$<\/span> là:<\/p>","options":["<strong>A.<\/strong> (0; 0; –5)","<strong>B.<\/strong> (–5; –5; 0)","<strong>C.<\/strong> (–5; –5; –5)","<strong>D.<\/strong> (–5; 0; –5)"],"correct":"1","level":"1","hint":"<p>Tr\u1ee5c Oz có vect\u01a1 \u0111\u01a1n v\u1ecb là <span class=\"math-tex\">$\\overrightarrow{k}=(0;0;1)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> (0; 0; –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 không gian Oxyz, cho \u0111i\u1ec3m A(–2; 3; 5). T\u1ecda \u0111\u1ed9 c\u1ee7a véct\u01a1 <span class=\"math-tex\">$\\overrightarrow{OA}$<\/span> là:<\/p>","options":["<strong>A.<\/strong> (–2; 3; 5)","<strong>B.<\/strong> (2; –3; 5)","<strong>C.<\/strong> (–2; –3; 5)","<strong>D.<\/strong> (2; –3; –5)"],"correct":"1","level":"1","hint":"<p>S\u1eed d\u1ee5ng công th\u1ee9c M(x; y; z) ⇔ <span class=\"math-tex\">$\\overrightarrow{OM}=(x;y;z)$<\/span>.<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> (–2; 3; 5)<\/span><\/p><p>A(–2; 3; 5) ⇔ <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}]}
