配套习题-等差数列通项公式的变形 -【青果学院】

本课配套习题挑战模式1/3

返回课程

单选题

难度系数：

1.已知

则

的最小值为（）

A: 1

B: 2

C: 3

D: 4

提示1：PGltZyB3aWR0aD0xODkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNkIvNDgvckJBQ0UxUzAwbVNodkpSU0FBQUM5VEVMQmdRMzIwLnBuZyI+
答案：Qw==
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

返回课程

单选题

难度系数：

2.已知

则

的最大值为（）

A: 1

B: 2

C: 3

D: 4

提示1：PGltZyB3aWR0aD0xMjAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNkIvNDgvckJBQ0UxUzAwbTN6RFNNRkFBQURBUkhHdGhZMjY5LnBuZyI+
答案：QQ==
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

返回课程

单选题

难度系数：

3.

的最小值为（）

A: 1

B: 2

C: 3

D: 4

提示1：PGltZyB3aWR0aD0xNDEgaGVpZ2h0PTI1IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMzcvNEIvckJBQ0oxUzAwbmJpUThmY0FBQURRdVVkUm9jOTY5LnBuZyI+
答案：Qw==
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