数列(混合数列)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/14 21:55:02
已知等差数列{an}中,a2=6,S5=45.等比数列{bn}b1=2,S2=6.数列{Cn}的奇数项依次由数列{bn}的各项组成.偶数项依次由数列{an}的各项组成. 1,求数列{Cn}的通项公式 2,求数列{cn}的前n项和
解题思路: 分别求和
解题过程:
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最终答案:略
解题过程:
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最终答案:略