设等比数列{an}的首项为a1=2,公比为q(q为正整数),且满足3a3是8a1
题型:解答题
问题:
设等比数列{an}的首项为a1=2,公比为q(q为正整数),且满足3a3是8a1与a5的等差中项;数列{an}满足2n2-(t+bn)n+
(1)求数列{an}的通项公式; (2)试确定实数t的值,使得数列{bn}为等差数列. |
设等比数列{an}的首项为a1=2,公比为q(q为正整数),且满足3a3是8a1与a5的等差中项;数列{an}满足2n2-(t+bn)n+
(1)求数列{an}的通项公式; (2)试确定实数t的值,使得数列{bn}为等差数列. |