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数列{an}中,Sn是前n项和,若a1=1,an+1=(n≥1,n∈N),则an...
数列{a
n}中,S
n是前n项和,若a
1=1,a
n+1=
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(n≥1,n∈N),则a
n=
.
考点分析:
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