已知实数x,y,满足(x-1)^2+(y-1)^2=9,求x^2+y^2的最大值和最小值
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已知实数x,y,满足(x-1)^2+(y-1)^2=9,求x^2+y^2的最大值和最小值
已知实数x,y,满足(x-1)^2+(y-1)^2=9,求x^2+y^2的最大值和最小值
已知实数x,y,满足(x-1)^2+(y-1)^2=9,求x^2+y^2的最大值和最小值
(x-1)^2+(y-1)^2=9
令x=3cost +1
y=3sint +1
x^2+y^2=(3cost +1)^2+(3sint +1)^2
=11+6(cost+sint)
=11+6(根号2)sin(t +45°)
最大值11+6(根号2)
最小值11-6(根号2)
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