配套习题-数列通项公式的求法（三） -【青果学院】

本课配套习题挑战模式1/3

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单选题

难度系数：

1.已知数列{a_n}中，

=2，(n-1)

=n

(n

), 则

=

A: n

B: 2n

C:3n

D:4n

提示1：PGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8xQS82NS9yQkFDRTFOWl8xZUNTVzNZQUFBQlVMeXFRMzgwNzgucG5nIj49Mm4=
答案：Qg==
6Kej77ya55SxPGltZyB3aWR0aD0xNzEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMUEvNjUvckJBQ0UxTlpfMlBTbDFrTkFBQUVRR3dtTko0MzEzLnBuZyI+MjxpbWcgd2lkdGg9NzAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvREUvNTAvckJBQ0ZGTlpfMlB4c3RKZ0FBQUJyakw0SzFBMjk4LnBuZyI+KzxpbWcgd2lkdGg9MzIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMUEvNjUvckJBQ0UxTlpfMkN4eHVQM0FBQUJlaHFkVzJFOTE2LnBuZyI+

本课配套习题挑战模式2/3

返回课程

单选题

难度系数：

2.数列{a_n}中，

=1,

(n

),则

=

A:

B: n

C: .

D:

提示1：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
答案：RA==
6Kej77ya55SxPGltZyB3aWR0aD0zNjAgaGVpZ2h0PTgzIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMUEvNjUvckJBQ0UxTlpfMkNRQVgxZ0FBQUlNeXN2YklZMDYxLnBuZyI+5Lik5byP55u45YeP5b6X5YiwPGltZyB3aWR0aD0xNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8xQS82NS9yQkFDRTFOWl8xZUNTVzNZQUFBQlVMeXFRMzgwNzgucG5nIj4tPGltZyB3aWR0aD0zMiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xQS82NS9yQkFDRTFOWl8yQ3h4dVAzQUFBQmVocWRXMkU5MTYucG5nIj49PGltZyB3aWR0aD01NyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9ERS81MC9yQkFDRkZOWl8yREIwemVBQUFBQnRTMXVDbk04ODkucG5nIj7vvIw8aW1nIHdpZHRoPTIxNSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xQS82NS9yQkFDRTFOWl8yRGpvRHBSQUFBRDZTVWZNTVE1MDIucG5nIj7vvIw8aW1nIHdpZHRoPTEyMCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9ERS81MC9yQkFDRkZOWl8yQ1FBdU5IQUFBQ01welhnSUEwNTEucG5nIj7CtzxpbWcgd2lkdGg9MTU1IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0RFLzUwL3JCQUNGRk5aXzJEUzZzSEVBQUFEbVVPY1d0TTk4MC5wbmciPizmlYU8aW1nIHdpZHRoPTEwNSBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xQS82NS9yQkFDRTFOWl8yR1NJcWxNQUFBRFc2QnFXTWcxMzQucG5nIj4=

本课配套习题挑战模式3/3

返回课程

单选题

难度系数：

3.在数列{a_n}中，

=1,前n项和

满足n

-(n+3)

=0,则{a_n}的通项公式为（）

A:

B: n

C:

D: n(n+1)

提示1：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
答案：QQ==
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本课配套习题挑战模式1/3

本课配套习题挑战模式2/3

本课配套习题挑战模式3/3

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