若x^2-4xy+5y^2-2y+1=0,求y^x的值.
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若x^2-4xy+5y^2-2y+1=0,求y^x的值.若x^2-4xy+5y^2-2y+1=0,求y^x的值.若x^2-4xy+5y^2-2y+1=0,求y^x的值.x^2-4xy+5y^2-2y+
若x^2-4xy+5y^2-2y+1=0,求y^x的值.
若x^2-4xy+5y^2-2y+1=0,求y^x的值.
若x^2-4xy+5y^2-2y+1=0,求y^x的值.
x^2-4xy+5y^2-2y+1=0
x^2-4xy+4y^2+y^2-2y+1=0
(x-2y)^2+(y-1)^2=0
(x-2y)^2=0
(y-1)^2=0
y-1=0
y=1
x-2y=0
x=2y=2*1=2
y^x=1^2=1
(x-2y)^2+(y-1)^2=0
x=2y,y=1
x=2,y=1
y^x=1
1
等式可以写成:(x-2y)^2+(y-1)^2=0
要两个平方的和为0,这两个平方必须为0,即y=1,x=2y=2,答案为1.
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