高中数学代数与函数一其他练习题79
题目内容

下列关于函数 http://picflow.koolearn.com/upload/papers/20140823/20140823220229812798.png判断正确的是(   ) ① http://picflow.koolearn.com/upload/papers/20140823/20140823220229843537.png的解集是 http://picflow.koolearn.com/upload/papers/20140823/20140823220229905636.png; ② http://picflow.koolearn.com/upload/papers/20140823/20140823220230046536.png是极小值, http://picflow.koolearn.com/upload/papers/20140823/20140823220230108519.png是极大值; ③ http://picflow.koolearn.com/upload/papers/20140823/20140823220230124447.png没有最小值,也没有最大值.

2021-07-15

A.①③

B.①②③

C.②

D.①②

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