{"common":{"save":0,"post_id":"6699","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7232","mon_id":"1158767","chapter_id":"1158893","post_id":"6699","question":"<p>Trong khai tri\u1ec3n nh\u1ecb th\u1ee9c Newton c\u1ee7a <span class=\"math-tex\">$(a+b)^5$<\/span> có bao nhiêu s\u1ed1 h\u1ea1ng?<\/p>","options":["<strong>A.<\/strong> 6","<strong>B.<\/strong> 7","<strong>C.<\/strong> 5","<strong>D.<\/strong> 4"],"correct":"1","level":"1","hint":"","answer":"<p>Trong khai tri\u1ec3n nh\u1ecb th\u1ee9c Newton c\u1ee7a <span class=\"math-tex\">$(a+b)^5$<\/span> có 5 + 1 = 6 s\u1ed1 h\u1ea1ng.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> 6.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-07-02 09:47:03","option_type":"txt","len":0},{"id":"7233","mon_id":"1158767","chapter_id":"1158893","post_id":"6699","question":"<p>Trong khai tri\u1ec3n nh\u1ecb th\u1ee9c Newton c\u1ee7a <span class=\"math-tex\">$(2x-1)^4$<\/span> có bao nhiêu s\u1ed1 h\u1ea1ng?<\/p>","options":["<strong>A.<\/strong> 3","<strong>B.<\/strong> 6","<strong>C.<\/strong> 4","<strong>D.<\/strong> 5"],"correct":"4","level":"1","hint":"","answer":"<p>Trong khai tri\u1ec3n nh\u1ecb th\u1ee9c Newton c\u1ee7a <span class=\"math-tex\">$(2x-1)^4$<\/span> có 4 + 1 = 5 s\u1ed1 h\u1ea1ng.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>D.<\/strong> 5.<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-07-02 09:49:25","option_type":"txt","len":0},{"id":"7236","mon_id":"1158767","chapter_id":"1158893","post_id":"6699","question":"<p>Trong khai tri\u1ec3n nh\u1ecb th\u1ee9c Newton c\u1ee7a <span class=\"math-tex\">$(4x-5)^4$<\/span>, s\u1ed1 h\u1ea1ng t\u1ed5ng quát c\u1ee7a khai tri\u1ec3n là <\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$C_4^k.4^k.5^{4-k}.x^{4-k}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$C_4^k.4^{4-k}.(-5)^{k}.x^{4-k}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$C_4^k.4^{4-k}.5^{k}.x^{4-k}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$C_4^k.4^k.(-5)^{4-k}.x^{4-k}$<\/span>"],"correct":"2","level":"1","hint":"","answer":"<p>S\u1ed1 h\u1ea1ng t\u1ed5ng quát c\u1ee7a khai tri\u1ec3n <span class=\"math-tex\">$(4x-5)^4$<\/span> là <span class=\"math-tex\">$C_4^k . (4x)^{4-k}.(-5)^k$<\/span> = <span class=\"math-tex\">$C_4^k.4^{4-k}.(-5)^k.x^{4-k}$<\/span> .<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>B.<\/strong> <span class=\"math-tex\">$C_4^k.4^{4-k}.(-5)^{k}.x^{4-k}$<\/span> .<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-07-02 09:58:09","option_type":"math","len":0}]}