设集合P={y丨x²-1,x属于R},Q={y丨y=-2x²+2,x属于R},求P交Q
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![设集合P={y丨x²-1,x属于R},Q={y丨y=-2x²+2,x属于R},求P交Q](/uploads/image/z/10228822-70-2.jpg?t=%E8%AE%BE%E9%9B%86%E5%90%88P%3D%EF%BD%9By%E4%B8%A8x%26%23178%3B-1%2Cx%E5%B1%9E%E4%BA%8ER%EF%BD%9D%2CQ%3D%EF%BD%9By%E4%B8%A8y%3D-2x%26%23178%3B%2B2%2Cx%E5%B1%9E%E4%BA%8ER%EF%BD%9D%2C%E6%B1%82P%E4%BA%A4Q)
设集合P={y丨x²-1,x属于R},Q={y丨y=-2x²+2,x属于R},求P交Q
设集合P={y丨x²-1,x属于R},Q={y丨y=-2x²+2,x属于R},求P交Q
设集合P={y丨x²-1,x属于R},Q={y丨y=-2x²+2,x属于R},求P交Q
p交q就是求方程组的解
y=x²-1
y=-2x²+2
解得x=1时y=0
x=-1时y=0
P交Q={0}