x的平方+y的平方-8x-10y+41=0x²-8x+16+y²-10y+25=0(x-4)²+(y-5)²=0x-4=0y-5=0∴x=4y=5求y/（x的平方-xy）+x/（y的平方-xy）=y/x(x-y)-x/y(x-y)=(y²-x²)/xy(x-y)=-(x+y)/xy=-(4+5)/20=...