高中数学代数与函数一其他练习题89
题目内容

已知二次函数 http://picflow.koolearn.com/upload/papers/20140823/20140823230911999752.png的导函数为 http://picflow.koolearn.com/upload/papers/20140823/20140823230912014481.pnghttp://picflow.koolearn.com/upload/papers/20140823/20140823230912030539.png,f(x)与x轴恰有一个交点,则 http://picflow.koolearn.com/upload/papers/20140823/20140823230912061626.png 的最小值为 (   )

2021-07-16

A.2

B.http://picflow.koolearn.com/upload/papers/20140823/20140823230912077388.png

C.3

D.http://picflow.koolearn.com/upload/papers/20140823/20140823230912108368.png

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