An operation, *, is defined as follows: for any positive numbers a and b. [img]2

游客2024-01-12 21

问题 An operation, *, is defined as follows: for any positive numbers a and b.

Which of the following is an integer?

选项 A、11*5
B、4*9
C、4*16
D、7*4
E、9*9

答案 D

解析

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