{"common":{"save":0,"post_id":"4537","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6413","post_id":"4537","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tìm t\u1ea5t c\u1ea3 các \u01b0\u1edbc chung c\u1ee7a 12 và -9.<\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/hoa-cay\/bouquet.png\" \/><\/div>","options":["<strong>A. <\/strong>-3; -1; 1; 3","<strong>B. <\/strong>-3; -1; 0; 1; 3","<strong>C. <\/strong>-3; -1; 1; 3; 4","<strong>D. <\/strong>-4;<strong> <\/strong>-3; -1; 1; 3"],"correct":"1","level":"3","hint":"<p>Tìm t\u1ea5t c\u1ea3 các \u01b0\u1edbc c\u1ee7a 12 và tìm t\u1ea5t c\u1ea3 các \u01b0\u1edbc c\u1ee7a -9. Sau \u0111ó ch\u1ecdn ra nh\u1eefng s\u1ed1 gi\u1ed1ng nhau, các s\u1ed1 \u0111ó chính là \u01b0\u1edbc chung c\u1ee7a 12 và -9.<\/p>","answer":"<p>Các \u01b0\u1edbc c\u1ee7a 12 g\u1ed3m -12; -6; -4; -3; -2; -1; 1; 2; 3; 4; 6; 12<\/p><p>Các \u01b0\u1edbc c\u1ee7a -9 g\u1ed3m -9; -3; -1; 1; 3; 9<\/p><p>Do \u0111ó các \u01b0\u1edbc chung c\u1ee7a 12 và -9 g\u1ed3m -3; -1; 1; 3 (ch\u1ecdn ra các s\u1ed1 gi\u1ed1ng nhau).<\/p><p>\u0110\u1ed1i chi\u1ebfu v\u1edbi \u0111áp án<\/p><p><strong>A. <\/strong>-3; -1; 1; 3 <span style=\"color:#16a085;\">\u0111úng<\/span><\/p><p><strong>B. <\/strong>-3; -1; 0; 1; 3 <span style=\"color:#e74c3c;\">sai<\/span> vì 0 không là \u01b0\u1edbc chung c\u1ee7a 12 và -9<\/p><p><strong>C. <\/strong>-3; -1; 1; 3; 4 <span style=\"color:#e74c3c;\">sai<\/span> vì 4 không là \u01b0\u1edbc chung c\u1ee7a 12 và -9<\/p><p><strong>D. <\/strong>-4;<strong> <\/strong>-3; -1; 1; 3 <span style=\"color:#e74c3c;\">sai<\/span> vì -4 không là \u01b0\u1edbc chung c\u1ee7a 12 và -9<\/p><p>V\u1eady \u0111áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A. -3; -1; 1; 3<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-24 13:01:03","option_type":"txt","len":2},{"id":"6414","post_id":"4537","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tìm x bi\u1ebft <span style=\"color:#3498db;\">12 . x = -36<\/span><\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/hoa-cay\/cay2.png\" \/><\/div>","options":["x= 2","x= 3","x= -3"],"correct":"3","level":"3","hint":"<p>Tìm x theo quy t\u1eafc n\u1ebfu a . x = b thì x = b : a (v\u1edbi a, b là các s\u1ed1 nguyên)<\/p>","answer":"<p>Ta có: 12 . x = -36<\/p><p> x = (-36) : 12<\/p><p> x = -3<\/p><p>V\u1eady ch\u1ecdn \u0111áp án<strong><span style=\"color:#16a085;\"> x = -3<\/span><\/strong><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"3","date":"2021-08-24 13:12:56","option_type":"txt","len":0},{"id":"6416","post_id":"4537","mon_id":"1158113","chapter_id":"1158128","question":"<p>Tìm x bi\u1ebft <span style=\"color:#3498db;\">(-11) . x + 23 = 12<\/span><\/p><div class=\"lt123_imgs\"><img class=\"img_dd small\" src=\"\/data\/library\/hoa-cay\/hoa.png\" \/><\/div>","options":["x = -1","x = 1","x = 0"],"correct":"2","level":"3","hint":"<p>Em coi (-11) . x là m\u1ed9t X thì em tìm X theo quy t\u1eafc X + A = B thì X = B - A.<\/p><p>Sau \u0111ó em tìm x theo quy t\u1eafc a . x = b thì x = b : a.<\/p>","answer":"<p>(-11) . x + 23 = 12<\/p><p>(-11) . x = 12 - 23<\/p><p>(-11) . x = -11<\/p><p> x = (-11) : (-11)<\/p><p> x = 1<\/p><p>V\u1eady ch\u1ecdn \u0111áp án <span style=\"color:#16a085;\"><strong>x = 1<\/strong><\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"132","test":"3","date":"2021-08-24 13:22:26","option_type":"txt","len":0}]}