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题目内容 (请给出正确答案)
单选题
a and b are positive, a is even and b is odd. Which of the following must also be odd?
A

ab

B

a/b

C

a + 2b

D

ba

E

(ab) a


参考答案

参考解析
解析:
An odd number raised to an even power equals an odd number. Take 32 = 9, for example, ba is the correct answer.
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