If 5＜x＜10 and 0＜y＜3/2, which of the following gives all possible values of xy?A、

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问题 If 5＜x＜10 and 0＜y＜3/2, which of the following gives all possible values of xy?

选项 A、0＜xy＜15/2
B、0＜xy＜15
C、3/2＜xy＜10
D、5＜xy＜10
E、15/2＜xy＜15

答案 B

解析根据上面的不等式性质4，0＜xy＜15，所以选择B。

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