集合A={y|y=x²-1,x∈R},B={y|y=-2x²+2,x∈R},求A∩B集合A={y|y=x²-1,x∈R}, B={y|y=-2x²+2,x∈R},求A∩B集合P={y|y=3x-1,x>1}, Q={y|y=-2x²+10,x∈R},求P∩Q
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集合A={y|y=x²-1,x∈R},B={y|y=-2x²+2,x∈R},求A∩B集合A={y|y=x²-1,x∈R}, B={y|y=-2x²+2,x∈R},求A∩B集合P={y|y=3x-1,x>1}, Q={y|y=-2x²+10,x∈R},求P∩Q
集合A={y|y=x²-1,x∈R},B={y|y=-2x²+2,x∈R},求A∩B
集合A={y|y=x²-1,x∈R}, B={y|y=-2x²+2,x∈R},求A∩B
集合P={y|y=3x-1,x>1}, Q={y|y=-2x²+10,x∈R},求P∩Q
集合A={y|y=x²-1,x∈R},B={y|y=-2x²+2,x∈R},求A∩B集合A={y|y=x²-1,x∈R}, B={y|y=-2x²+2,x∈R},求A∩B集合P={y|y=3x-1,x>1}, Q={y|y=-2x²+10,x∈R},求P∩Q
1、
y=x²-1≥-1
y=-2x²+2≤2
所以A∩B={y|-1≤y≤2}
2、
x>1,则y>3-1=2
y=-2x²+10≤10
所以p∩Q={y|2≤y≤10}
[一1,2]
(2,10]