Chú ý: Để đảm bảo quyền lợi và bảo vệ tài khoản của mình
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{"common":{"save":0,"post_id":"6453","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6848","mon_id":"1158767","chapter_id":"1158861","post_id":"6453","question":"<p>Trên tr\u1ee5c t\u1ecda \u0111\u1ed9 (O; <span class=\"math-tex\">$\\overrightarrow{i}$<\/span>), cho hai \u0111i\u1ec3m A, B có t\u1ecda \u0111\u1ed9 l\u1ea7n l\u01b0\u1ee3t là –2; 1. T\u1ecda \u0111\u1ed9 c\u1ee7a vecto <span class=\"math-tex\">$\\overrightarrow{AB}$<\/span> là<\/p>","options":["<strong>A.<\/strong> -3","<strong>B.<\/strong> 3","<strong>C.<\/strong> 1","<strong>D.<\/strong> -1"],"correct":"2","level":"1","hint":"","answer":"<p><span class=\"svgedit\"><svg height=\"80\" width=\"310\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"82\" id=\"canvas_background\" width=\"312\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <image height=\"60\" id=\"svg_1\" width=\"312\" x=\"0\" xlink:href=\"data:image\/png;base64,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\" y=\"7\"><\/image> <\/g> <\/svg><\/span><\/p><p>Ta có: <span class=\"math-tex\">$\\overline{AB}$<\/span> = 1 + 2 = 3 ⇒ <span class=\"math-tex\">$\\overrightarrow{AB}$<\/span> = 3<span class=\"math-tex\">$\\overrightarrow{i}$<\/span> .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> 3<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 02:53:17","option_type":"txt","len":0},{"id":"6851","mon_id":"1158767","chapter_id":"1158890","post_id":"6453","question":"<p>Trên tr\u1ee5c t\u1ecda \u0111\u1ed9 (O; <span class=\"math-tex\">$\\overrightarrow{i}$<\/span>), cho hai \u0111i\u1ec3m A, B có t\u1ecda \u0111\u1ed9 l\u1ea7n l\u01b0\u1ee3t là 3; –5. T\u1ecda \u0111\u1ed9 trung \u0111i\u1ec3m I c\u1ee7a AB là<\/p>","options":["<strong>A.<\/strong> 4","<strong>B.<\/strong> –4","<strong>C.<\/strong> 1","<strong>D.<\/strong> –1"],"correct":"4","level":"1","hint":"","answer":"<p>T\u1ecda \u0111\u1ed9 \u0111i\u1ec3m I là <span class=\"math-tex\">$x_I = \\dfrac{3+(-5)}{2}$<\/span> = –1.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> –1<\/span>.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 02:58:35","option_type":"txt","len":1},{"id":"6853","mon_id":"1158767","chapter_id":"1158890","post_id":"6453","question":"<p>Trong m\u1eb7t ph\u1ea3ng t\u1ecda \u0111\u1ed9 Oxy, cho \u0111i\u1ec3m M(x; y). Tìm t\u1ecda \u0111\u1ed9 \u0111i\u1ec3m <span class=\"math-tex\">$M_1$<\/span> \u0111\u1ed1i x\u1ee9ng v\u1edbi M qua tr\u1ee5c hoành.<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$M_1 (x; -y)$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$M_1 (-x;y)$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$M_1 (-x; -y)$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$M_1 (x; y)$<\/span>"],"correct":"1","level":"1","hint":"","answer":"<p><span class=\"math-tex\">$M_1$<\/span> \u0111\u1ed1i x\u1ee9ng v\u1edbi M qua tr\u1ee5c hoành suy ra <span class=\"math-tex\">$M_1 (x; -y)$<\/span> .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$M_1 (x; -y)$<\/span><\/span> .<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-05-30 03:01:56","option_type":"math","len":0}]}