已知公差为d(d>1)的等差数列{an}和公比为q(q>1)的等比数列{bn},满足集合{a3,a4,a5}∪{b3,b4,b5}={1,2,3,4,5} (1)求通项an,bn; (2)求数列{anbn}的前n项和Sn; (3)若恰有4个正整数n使不等式≤成立,求正整数p的值. |
与“已知公差为d(d>1)的等差数列{an}和公比为q(q>1)的等比数列{bn},满足集合{a3,a4,a5}∪{b3,b4,b5}={1,2,3,4,5}(1)求通项an,bn;(2)求数列{anbn}的前n项和Sn;(3)若恰”考查相似的试题有: