设数列{an}的前n项和为Sn,且满足Sn=2-an,(n=1,2,3,…)(Ⅰ
题型:解答题
问题:
设数列{an}的前n项和为Sn,且满足Sn=2-an,(n=1,2,3,…) (Ⅰ)求数列{an}的通项公式; (Ⅱ)若数列{bn}满足b1=1,且bn+1=bn+an,求数列{bn}的通项公式; (Ⅲ)cn=
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设数列{an}的前n项和为Sn,且满足Sn=2-an,(n=1,2,3,…) (Ⅰ)求数列{an}的通项公式; (Ⅱ)若数列{bn}满足b1=1,且bn+1=bn+an,求数列{bn}的通项公式; (Ⅲ)cn=
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