已知x^2+9y^2-2x-6y+2=0,求{-(xy/(x-y)^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值
问题描述:
已知x^2+9y^2-2x-6y+2=0,求{-(xy/(x-y)^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值
答
已知x^2+9y^2-2x-6y+2=0
则:(x-1)^2+(3y-1)^2=0
∴x-1=0和3y-1=0
∴x=1,y=1/3代入式中即可算出!