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问题: 集合

设全集U=\(x,y)x y∈R\ A=\( x y) y=x+2\ B=\(x y) y-4除以x-2 \则A ∩CuB=

解答:

设全集U={(x,y)|x,y∈R}, A={(x,y)|y=x+2}, B={(x,y)|y=4/(x-2)|则A∩CuB=

A∩B = {(2√2,2√2+2),(-2√2,-2√2+2)}
--->A∩CuB = {(x,y)|y=x+2,x≠±2√2}