{"common":{"save":0,"post_id":"6468","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6983","mon_id":"1158767","chapter_id":"1158892","post_id":"6468","question":"<p>Trong m\u1eb7t ph\u1eb3ng Oxy,&nbsp;\u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d):ax+by+c=0,(a^2+b^2\\ne0)$<\/span>. Vect\u01a1 n&agrave;o sau \u0111&acirc;y l&agrave;&nbsp;m\u1ed9t vect\u01a1 ph&aacute;p tuy\u1ebfn c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d)$<\/span>?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(a;-b)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(b;a)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(b;-a)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(a;b)$<\/span>"],"correct":"4","level":"1","hint":"","answer":"<p>Ta c&oacute; m\u1ed9t vect\u01a1 ph&aacute;p tuy\u1ebfn c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d)$<\/span>&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{n}=(a;b)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>D.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(a;b)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-31 05:10:16","option_type":"math","len":0},{"id":"6984","mon_id":"1158767","chapter_id":"1158892","post_id":"6468","question":"<p>Trong m\u1eb7t ph\u1eb3ng t\u1ecda \u0111\u1ed9 Oxy, cho \u0111\u01b0\u1eddng th\u1eb3ng&nbsp;<span class=\"math-tex\">$(d):x-3y+4=0$<\/span>. Vect\u01a1 ph&aacute;p tuy\u1ebfn c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng d l&agrave;:<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(3;1)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(2;1)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(1;-3)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(-3;4)$<\/span>"],"correct":"3","level":"1","hint":"","answer":"<p>Ta c&oacute; m\u1ed9t vect\u01a1 ph&aacute;p tuy\u1ebfn c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d)$<\/span>&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{n}=(1;-3)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{n}=(1;-3)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-31 05:11:18","option_type":"math","len":0},{"id":"6985","mon_id":"1158767","chapter_id":"1158892","post_id":"6468","question":"<p>Trong m\u1eb7t ph\u1eb3ng Oxy,&nbsp;\u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d):ax+by+c=0,(a^2+b^2\\ne0)$<\/span>. Vect\u01a1 n&agrave;o sau \u0111&acirc;y l&agrave;&nbsp;m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d)$<\/span>?<\/p>","options":["<strong>A. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(-a;b)$<\/span>","<strong>B. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(b;-a)$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(b;a)$<\/span>","<strong>D. <\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(a;b)$<\/span>"],"correct":"2","level":"1","hint":"","answer":"<p>Ta c&oacute; m\u1ed9t vect\u01a1 ch\u1ec9 ph\u01b0\u01a1ng&nbsp;c\u1ee7a \u0111\u01b0\u1eddng th\u1eb3ng <span class=\"math-tex\">$(d)$<\/span>&nbsp;l&agrave; <span class=\"math-tex\">$\\overrightarrow{u}=(b;a)$<\/span>.<\/p><p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.&nbsp;<\/strong><span class=\"math-tex\">$\\overrightarrow{u}=(b;-a)$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-31 08:23:05","option_type":"math","len":0}]}