{"common":{"save":0,"post_id":"7145","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5797","post_id":"7145","mon_id":"1158924","chapter_id":"1159182","question":"<p>M\u1ed9t h\u1ed9p \u0111\u1ef1ng 70 t\u1ea5m th\u1ebb, \u0111ánh s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 70. Rút ng\u1eabu nhiên m\u1ed9t t\u1ea5m th\u1ebb. G\u1ecdi A là bi\u1ebfn c\u1ed1: "Rút \u0111\u01b0\u1ee3c th\u1ebb ghi s\u1ed1 là \u01b0\u1edbc c\u1ee7a 28", B là bi\u1ebfn c\u1ed1: "Rút \u0111\u01b0\u1ee3c th\u1ebb ghi s\u1ed1 là \u01b0\u1edbc c\u1ee7a 70". Xét bi\u1ebfn c\u1ed1 C: "Rút \u0111\u01b0\u1ee3c th\u1ebb ghi s\u1ed1 là \u01b0\u1edbc c\u1ee7a 14". K\u1ebft lu\u1eadn nào sau \u0111ây là \u0111úng?<\/p>","options":["<strong>A.<\/strong> C = A ∪ B","<strong>B.<\/strong> C = A ∩ B","<strong>C.<\/strong> C = A ∩ <span class=\"math-tex\">$\\overline{B}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$\\overline{A}$<\/span> ∩ B"],"correct":"2","level":"2","hint":"","answer":"<p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>B.<\/strong> C = A ∩ B.<\/span><\/p><p>A = {1; 2; 4; 7; 14; 28}<\/p><p>B = {1; 2; 5; 7; 10; 14; 35; 70}<\/p><p>C = {1; 2; 7; 14}.<\/p><p>Ta có A ∩ B = {1; 2; 7; 14} = C.<\/p><p>Do \u0111ó C = A ∩ B.<\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-05-27 04:15:49","option_type":"math","len":0},{"id":"5798","post_id":"7145","mon_id":"1158924","chapter_id":"1159182","question":"<p>Cho A và B là hai bi\u1ebfn c\u1ed1 c\u1ee7a cùng m\u1ed9t không gian m\u1eabu <span class=\"math-tex\">$\\Omega$<\/span>. Phát bi\u1ec3u nào sau \u0111ây là <strong>sai<\/strong>?<\/p>","options":["<strong>A.<\/strong> N\u1ebfu A = <span class=\"math-tex\">$\\overline{B}$<\/span> thì B = <span class=\"math-tex\">$\\overline{A}$<\/span>.","<strong>B.<\/strong> N\u1ebfu A ∩ B = ∅ thì A và B \u0111\u1ed1i nhau.","<strong>C.<\/strong> N\u1ebfu A, B \u0111\u1ed1i nhau thì A ∪ B = <span class=\"math-tex\">$\\Omega$<\/span>.","<strong>D.<\/strong> N\u1ebfu A là bi\u1ebfn c\u1ed1 không th\u1ec3 thì <span class=\"math-tex\">$\\overline{A}$<\/span> là bi\u1ebfn c\u1ed1 ch\u1eafc ch\u1eafn."],"correct":"2","level":"2","hint":"","answer":"<p>Câu <strong>sai <\/strong>là <span style=\"color:#16a085;\"><strong>B.<\/strong> N\u1ebfu A ∩ B = ∅ thì A và B \u0111\u1ed1i nhau.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-05-27 04:20:36","option_type":"math","len":0},{"id":"5800","post_id":"7145","mon_id":"1158924","chapter_id":"1159182","question":"<p>Xét phép th\u1eed gieo ng\u1eabu nhiên m\u1ed9t con xúc x\u1eafc \u0111\u1ed3ng ch\u1ea5t sáu m\u1eb7t. G\u1ecdi A là bi\u1ebfn c\u1ed1 "S\u1ed1 ch\u1ea5m thu \u0111\u01b0\u1ee3c là s\u1ed1 ch\u1eb5n" và B là bi\u1ebfn c\u1ed1 "S\u1ed1 ch\u1ea5m thu \u0111\u01b0\u1ee3c là s\u1ed1 không chia h\u1ebft cho 4". Hãy mô t\u1ea3 bi\u1ebfn c\u1ed1 AB.<\/p>","options":["<strong>A.<\/strong> {2; 6}","<strong>B.<\/strong> {2; 4; 6}","<strong>C.<\/strong> {1; 2; 3; 5; 6}","<strong>D.<\/strong> {1; 2; 3}"],"correct":"1","level":"2","hint":"","answer":"<p>A = {2; 4; 6}<\/p><p>B = {1; 2; 3; 5; 6}<\/p><p>AB = {2; 6}<\/p><p>Ch\u1ecdn <span style=\"color:#16a085;\"><strong>A.<\/strong> {2; 6}.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2024-05-27 04:24:15","option_type":"txt","len":2}]}
