高中数学代数与函数一函数练习题80
题目内容

设函数g(x)=x 2-2(x∈R),f(x)= http://picflow.koolearn.com/upload/2014-04/06/304bd077-921a-414b-82ec-7d9f1447daac/paper.files/image039.png则f(x)的值域是(  )

2021-08-04

A.http://picflow.koolearn.com/upload/2014-04/06/304bd077-921a-414b-82ec-7d9f1447daac/paper.files/image040.png∪(1,+∞)

B.[0,+∞)

C.http://picflow.koolearn.com/upload/2014-04/06/304bd077-921a-414b-82ec-7d9f1447daac/paper.files/image042.png

D.http://picflow.koolearn.com/upload/2014-04/06/304bd077-921a-414b-82ec-7d9f1447daac/paper.files/image043.png∪(2,+∞)

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