摘要:(III)设Sn为数列的前n项和.证明:
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设数列{an}的前n项和为Sn,且Sn=(1+λ)-λan,其中λ≠-1,0;
(I)证明:数列{an}是等比数列.
(II)设数列{an}的公比q=f(λ),数列{bn}满足b1=
,bn=f(bn-1)(n∈N*,n≥2)求数列{bn}的通项公式;
(III)记λ=1,记Cn=an(
-1),求数列{Cn}的前n项和为Tn.
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(I)证明:数列{an}是等比数列.
(II)设数列{an}的公比q=f(λ),数列{bn}满足b1=
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(III)记λ=1,记Cn=an(
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bn |