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已知x>0,y>0,且http://picflow.koolearn.com/upload/papers/g02/20110923/20110923113328328989.gif,若x+2y>m2+2m恒成立,则实数m的取值范围是

发布时间:2021-07-20

A.m≥4或m≤-2

B.m≥2或m≤-4

C.-2<m<4

D.-4<m<2

试卷相关题目

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  • 2已知二次函数f(x)=ax2+bx+c(x∈R)的部分对应值如表:x-3-2-1012345…y-24-1006860-10-24…则使ax2+bx+c>0成立的x的取值范围是

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