{"common":{"save":0,"post_id":"6720","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7413","mon_id":"1158767","chapter_id":"1158892","post_id":"6720","question":"<p>Vect\u01a1 n&agrave;o d\u01b0\u1edbi \u0111&acirc;y l&agrave; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi tr\u1ee5c Ox?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(1;0)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(0;-1)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(-1;1)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(1;1)$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p>Tr\u1ee5c Ox c&oacute; ph\u01b0\u01a1ng tr&igrave;nh y = 0 n&ecirc;n c&oacute; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{u}=(1;0)$<\/span> n&ecirc;n \u0111\u01b0\u1eddng th\u1eb3ng&nbsp;song song v\u1edbi Ox c\u0169ng c&oacute; m\u1ed9t&nbsp;vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{u}=(1;0)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>A.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(1;0)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-10-01 21:22:43","option_type":"math","len":0},{"id":"7414","mon_id":"1158767","chapter_id":"1158892","post_id":"6720","question":"<p>Vect\u01a1 n&agrave;o d\u01b0\u1edbi \u0111&acirc;y l&agrave; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi tr\u1ee5c Oy?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(-1;0)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(0;1)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(1;1)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(1;-1)$<\/span>"],"correct":"2","level":"1","hint":"","answer":"<p>Tr\u1ee5c Oy c&oacute; ph\u01b0\u01a1ng tr&igrave;nh x = 0 n&ecirc;n c&oacute; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{u}=(0;1)$<\/span> n&ecirc;n \u0111\u01b0\u1eddng th\u1eb3ng&nbsp;song song v\u1edbi Oy&nbsp;c\u0169ng c&oacute; m\u1ed9t&nbsp;vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{u}=(0;1)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(0;1)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-10-01 21:23:23","option_type":"math","len":0},{"id":"7415","mon_id":"1158767","chapter_id":"1158892","post_id":"6720","question":"<p>Vect\u01a1 n&agrave;o d\u01b0\u1edbi \u0111&acirc;y l&agrave; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng \u0111i qua g\u1ed1c t\u1ecda \u0111\u1ed9 O(0; 0) v&agrave; \u0111i\u1ec3m M(a; b)?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(0;a+b)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(a;b)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(a;-b)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(-b;a)$<\/span>"],"correct":"2","level":"1","hint":"","answer":"<p>\u0110\u01b0\u1eddng th\u1eb3ng OM c&oacute; m\u1ed9t&nbsp;vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng l&agrave;&nbsp;<span class=\"math-tex\">$\\overrightarrow{u}=\\overrightarrow{OM}=(a;b)$<\/span><\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(a;b)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-10-01 21:27:40","option_type":"math","len":0}]}