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设数列{an}满足:a1=1,(1)求a2,a3; (2)令,求数列{bn}的通项公式;(...
试题详情
设数列{a
n}满足:a
1=1,
(1)求a
2,a
3;
(2)令
,求数列{b
n}的通项公式;
(3)已知f(n)=6a
n+1-3a
n,求证:
.
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设数列{an}满足:a1=1,
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设数列{an}满足:a1=1,
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(Ⅱ)求数列{an}的通项公式;
(Ⅲ)设,数列{bn}的前n项的和为Tn,求证:.
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数列{an}满足a1=2,an+1=an2+6an+6(n∈N×)
(Ⅰ)设Cn=log5(an+3),求证{Cn}是等比数列;
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数列{an}满足a1=2,an+1=an2+6an+6(n∈N×)
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(Ⅱ)求数列{an}的通项公式;
(Ⅲ)设,数列{bn}的前n项的和为Tn,求证:.