集合A={x|-2≤x≤a},B={y|y=2x+3,x∈A},C={y|y=x²,x∈A}且B包含C(C包含于B),则实数a的取值范围
集合A={x|-2≤x≤a},B={y|y=2x+3,x∈A},C={y|y=x²,x∈A}且B包含C(C包含于B),则实数a的取值范围
数学人气:759 ℃时间:2019-10-05 13:51:08
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(-1,3】 画图可解.
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