配套习题- 数列通项公式的求法（四） -【青果学院】

1/3单选题

难度：

1.设数列{a_n}满足：

=2,

=2

+1,数列{a_n}的通项公式为：（）

A
B
C
D

正确答案：Qg==

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

2/3单选题

难度：

2.设数列{a_n}满足：

=2,

=2

+2n-1,数列{a_n}的通项公式为（）

A
B
C
D

正确答案：Qw==

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

3/3单选题

难度：

3.已知数列{a_n}满足：

=

，

=

，

<0(n

), 数列{b_n}满足: b_n=

-

，则数列{b_n}中的任意三项（）成等差数列

A	可能
B	无法判断
C	不可能

正确答案：Qw==

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