If r is negative and s is positive, which of the following must be negative? -题库考试答案搜索网

If r is negative and s is positive, which of the following must be negative?

单选题

2022-01-11 14:20

A、<img width="24" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-18/99939977-3243-4e25-af56-0137beac3d44.png">
B、<img width="24" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-18/28445973-4079-4c0f-b316-4e44edf0efe2.png">
C、r2+s
D、r2s2
E、<img width="21" height="41" src="https://static.tiw.cn//s/tiw/p3/UpLoadImage/2016-09-18/9b5efd84-db91-4bb8-a176-5a1db5251a10.png">

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正确答案

试题解析

利用赋值法可知，B项是正确的。

标签：国外英语考试 GMAT

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