A={y|y>=-4} B={y|y<=14}
则A∩B={y|-4<=y<=14}
A∪B=R
已知集合A={y|y=x²-2x-3,x∈R},B={y|y=-x²+2x+13,x∈R},求A∩B,A∪B
已知集合A={y|y=x²-2x-3,x∈R},B={y|y=-x²+2x+13,x∈R},求A∩B,A∪B
数学人气:930 ℃时间:2020-01-20 00:26:58
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