What is the sum of the first 8 odd integers that are greater than zero?

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问题 What is the sum of the first 8 odd integers that are greater than zero?

选项 A、80
B、25
C、64
D、70
E、36

答案C

解析连续的奇数或者连续的偶数都是公差为2的等差数列。从1开始连续n个奇数的和为：

=n²。那么连续8个从1开始的奇数的和当然为8²=64，所以C选项为正确答案。

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