高中数学代数与函数一其他练习题81
题目内容

函数y=xcosx﹣sinx在下面哪个区间内是增函数

2021-07-15

A.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952347736.pnghttp://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952502978.png

B.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952618225.png,2http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952733225.png

C.(http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952864978.pnghttp://picflow.koolearn.com/upload/papers/g02/20120831/20120831215952996983.png

D.(2http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215953119225.png,3http://picflow.koolearn.com/upload/papers/g02/20120831/20120831215953234225.png

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