问题
填空题
已知M={y|y=x2},N={y|x2+y2=2},则M∩N=________.
答案
[0,]
M={y|y≥0},N={y|x2=2-y2}={y|-≤y≤
}.∴M∩N=[0,
]
已知M={y|y=x2},N={y|x2+y2=2},则M∩N=________.
[0,]
M={y|y≥0},N={y|x2=2-y2}={y|-≤y≤
}.∴M∩N=[0,
]