高中数学代数与函数一其他练习题79
题目内容

http://picflow.koolearn.com/upload/papers/20140823/201408232154181611041.png在区间[1,3]上为单调增函数,则实数a的取值范围是(     )

2021-07-15

A.[ -http://picflow.koolearn.com/upload/papers/20140823/20140823215418177343.png,+∞)

B.(-∞,-3]

C.(-∞,-3]∪[-http://picflow.koolearn.com/upload/papers/20140823/20140823215418177343.png,+∞)

D.[- http://picflow.koolearn.com/upload/papers/20140823/20140823215418177343.png, http://picflow.koolearn.com/upload/papers/20140823/20140823215418177343.png]

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