{"common":{"save":0,"post_id":"7753","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7196","post_id":"7753","mon_id":"1159278","chapter_id":"1159281","question":"<p>Ph\u01b0\u01a1ng trình nào sau \u0111ây là ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n?<\/p>","options":["<strong>A.<\/strong> x² = 0","<strong>B.<\/strong> 0y = 1","<strong>C.<\/strong> 3x + y = 5","<strong>D.<\/strong> <span class=\"math-tex\">$\\dfrac{1}{x}=0$<\/span>"],"correct":"3","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> 3x + y = 5.<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:16:18","option_type":"math","len":0},{"id":"7197","post_id":"7753","mon_id":"1159278","chapter_id":"1159281","question":"<p>Cho ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n có d\u1ea1ng x – <span class=\"frac123\"><span class=\"ts\">y<\/span><span class=\"ms\">3<\/span><\/span> – 1 = 0. H\u1ec7 s\u1ed1 a, b, c l\u1ea7n l\u01b0\u1ee3t là:<span class=\"frac123\"><span class=\"ms\"><\/span><\/span><\/p>","options":["<strong>A.<\/strong> 1 ; <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> ; 1","<strong>B.<\/strong> 1 ; <span class=\"math-tex\">$-\\dfrac{1}{3}$<\/span> ; –1","<strong>C.<\/strong> 1 ; <span class=\"math-tex\">$\\dfrac{1}{3}$<\/span> ; –1","<strong>D.<\/strong> 1 ; <span class=\"math-tex\">$-\\dfrac{1}{3}$<\/span> ; 1"],"correct":"4","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>D.<\/strong> 1 ; <span class=\"math-tex\">$-\\dfrac{1}{3}$<\/span> ; 1.<\/span><\/p><p>Ph\u01b0\u01a1ng trình x – <span class=\"frac123\"><span class=\"ts\">y<\/span><span class=\"ms\">3<\/span><\/span> – 1 = 0 hay x – <span class=\"frac123\"><span class=\"ts\">y<\/span><span class=\"ms\">3<\/span><\/span> = 1 có h\u1ec7 s\u1ed1 a = 1; b = <span class=\"math-tex\">$-\\dfrac{1}{3}$<\/span>; c = 1.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:21:57","option_type":"math","len":0},{"id":"7198","post_id":"7753","mon_id":"1159278","chapter_id":"1159281","question":"<p>\u0110i\u1ec1u ki\u1ec7n \u0111\u1ec3 ph\u01b0\u01a1ng trình ax + by = c là ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n là:<\/p>","options":["<strong>A.<\/strong> a <span class=\"math-tex\">$\\ne$<\/span> 0; b <span class=\"math-tex\">$\\ne$<\/span> 0","<strong>B.<\/strong> a <span class=\"math-tex\">$\\ne$<\/span> 0 ho\u1eb7c b <span class=\"math-tex\">$\\ne$<\/span> 0","<strong>C.<\/strong> a = 0; b <span class=\"math-tex\">$\\ne$<\/span> 0 và c <span class=\"math-tex\">$\\ne$<\/span> 0","<strong>D.<\/strong> a <span class=\"math-tex\">$\\ne$<\/span> 0; c <span class=\"math-tex\">$\\ne$<\/span> 0"],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> a <span class=\"math-tex\">$\\ne$<\/span> 0 ho\u1eb7c b <span class=\"math-tex\">$\\ne$<\/span> 0.<\/span><\/p><p>Ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n x, y là h\u1ec7 th\u1ee9c d\u1ea1ng: ax + by = c, trong \u0111ó a, b, c là các s\u1ed1 \u0111ã bi\u1ebft, a ≠ 0 ho\u1eb7c b ≠ 0.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-10-04 01:25:10","option_type":"math","len":0}]}