设全集U=R,A={x|x2},B={y|y=x2+a},若CuA包含于B,求:实数a的取值范围
设全集U=R,A={x|x<-1或x>2},B={y|y=x2+a},若CuA包含于B,求:实数a的取值范围
设全集U=R,A={x|x<-1或x>2},B={y|y=x^2+a},若CuA包含于B,求:实数a的取值范围
设全集U=R,A={x|x<-1或x>2},B={y|y=x^2+a},若CuA包含于B,求:实数a的取值范围
数学人气:690 ℃时间:2020-02-02 23:44:08
优质解答
a的取值范围为小于负一能给下过程么?谢谢!CuA={x|-1<x<2}因为B={y|y=x^2+a}所以x^2>0所以x^2+a>-1所以a<-1
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