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数列{an}的前n项和为Sn,a1=1,an+1=2Sn+1,等差数列{bn}满足b3=3...
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数列{a
n}的前n项和为S
n,a
1=1,a
n+1=2S
n+1,等差数列{b
n}满足b
3=3,b
5=9,(1)分别求数列{a
n},{b
n}的通项公式;
(2)若对任意的n∈N
*,
恒成立,求实数k的取值范围.
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