分式化简求值(X+Y)/(X-Y),其中X^2+Y^2-2X-6Y+10=0写出解答过程!谢谢!
1个回答
由X^2+Y^2-2X-6Y+10=0得(x-1)^2+(y-3)^2=0所以x=1,y=3
(X+Y)/(X-Y)=(1+3)/(1-3)=-2
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