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问题: 若集合M={y|y=-x^2+5,x∈R},P={y|y=x+4/(x-1),x>1}则M∩P=_

若集合M={y|y=-x^2+5,x∈R},P={y|y=x+4/(x-1),x>1}则M∩P=__

解答:

若集合M={y|y=-x²+5,x∈R},P={y|y=x+4/(x-1),x>1}则M∩P=__

M = {y|y=-x²+5,x∈R} = (-∞,5]
P = {y|y=(x-1)+4/(x-1)+1≥2*2+1=3,x>1} = [5,+∞)

--->M∩P = {5}