y=x^2+2≥2
M={y|y=x^2+2,x屬于R}={y|y≥2}
y=4-x^2≤4
N={y|y=4-x^2,x屬于R}={y|y≤4}
所以M∩N={y|2≤y≤4}
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已知集合M={y|y=x^2+2,x屬于R},N={y|y=4-x^2,x屬于R},求M交N.
已知集合M={y|y=x^2+2,x屬于R},N={y|y=4-x^2,x屬于R},求M交N.
數(shù)學(xué)人氣:697 ℃時(shí)間:2020-04-11 15:29:25
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