{"common":{"save":0,"post_id":"7379","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6830","post_id":"7379","mon_id":"1159278","chapter_id":"1159281","question":"<p>Trong m\u1eb7t ph\u1eb3ng Oxy, t\u1eadp nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng trình 4x + y = 1 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1edfi \u0111\u1ed3 th\u1ecb hàm s\u1ed1 nào d\u01b0\u1edbi \u0111ây?<\/p>","options":["<strong>A.<\/strong> y = –4x + 1","<strong>B.<\/strong> y = –4x – 1","<strong>C.<\/strong> y = 4x + 1","<strong>D.<\/strong> y = 4x – 1"],"correct":"1","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> y = –4x + 1<\/span><\/p><p>Ta có: 4x + y = 1 nên y = –4x + 1<\/p><p>Suy ra t\u1eadp nghi\u1ec7m c\u1ee7a ph\u01b0\u01a1ng trình 4x + y = 1 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1edfi \u0111\u1ed3 th\u1ecb hàm s\u1ed1 y = –4x + 1.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"119","test":"0","date":"2024-05-07 08:49:38","option_type":"txt","len":2},{"id":"6834","post_id":"7379","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> <span class=\"math-tex\">$2x^2+3=0$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\sqrt{x+y}=2$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$3x+\\dfrac{y}{2}=5$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$3x+\\dfrac{2}{y}=1$<\/span>"],"correct":"3","level":"1","hint":"<p>Ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n x và y là h\u1ec7 th\u1ee9c d\u1ea1ng <span class=\"math-tex\">$ax+by=c$<\/span>, trong \u0111ó a, b, c là các s\u1ed1 \u0111ã bi\u1ebft (<span class=\"math-tex\">$a\\ne0$<\/span> ho\u1eb7c <span class=\"math-tex\">$b\\ne0$<\/span>).<\/p>","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>C.<\/strong> <span class=\"math-tex\">$3x+\\dfrac{y}{2}=5$<\/span><\/span><\/p><p>Ph\u01b0\u01a1ng trình <span style=\"color:#16a085;\"><span class=\"math-tex\">$3x+\\dfrac{y}{2}=5$<\/span><\/span> là ph\u01b0\u01a1ng trình b\u1eadc nh\u1ea5t hai \u1ea9n.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-09-19 02:30:39","option_type":"math","len":0},{"id":"6845","post_id":"7379","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 ≠ 0 và b ≠ 0","<strong>B.<\/strong> a ≠ 0 ho\u1eb7c b ≠ 0","<strong>C.<\/strong> a = 0 và b = 0","<strong>D.<\/strong> c ≠ 0 ho\u1eb7c b ≠ 0"],"correct":"2","level":"1","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> a ≠ 0 ho\u1eb7c b ≠ 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":"2024-09-23 07:24:43","option_type":"txt","len":2}]}
