高中数学代数与函数一其他练习题134
题目内容

设函数f(x)=http://picflow.koolearn.com/upload/papers/g02/20120401/201204011541269351475.gif,则不等式f(x)≥2x2的解集是

2021-07-20

A.http://picflow.koolearn.com/upload/papers/g02/20120401/201204011541269831025.gif

B.http://picflow.koolearn.com/upload/papers/g02/20120401/201204011541270121029.gif

C.http://picflow.koolearn.com/upload/papers/g02/20120401/201204011541270401081.gif

D.[ -1,1]

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