高中数学代数与函数一其他练习题86
题目内容

已知函数 http://picflow.koolearn.com/upload/papers/20140823/20140823162923119572.gif,则关于 http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif的零点叙述正确的是(   )

2021-07-16

A.当a=0时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有两个零点

B.函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif必有一个零点是正数[

C.当http://picflow.koolearn.com/upload/papers/20140823/20140823162923182252.gif时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有两个零点

D.当http://picflow.koolearn.com/upload/papers/20140823/20140823162923322250.gif时,函数http://picflow.koolearn.com/upload/papers/20140823/20140823162923135287.gif有一个零点

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