若x2+y2-4x-6y+13=0则(-y/x3)3÷(-1/xy)4 X(x/y2)2=?(其中3.4.2均为指数)
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若x2+y2-4x-6y+13=0则(-y/x3)3÷(-1/xy)4 X(x/y2)2=?(其中3.4.2均为指数)
若x2+y2-4x-6y+13=0则(-y/x3)3÷(-1/xy)4 X(x/y2)2=?(其中3.4.2均为指数)
若x2+y2-4x-6y+13=0则(-y/x3)3÷(-1/xy)4 X(x/y2)2=?(其中3.4.2均为指数)
x^2+y^2-4x-6y+13=0
(x-2)^2+(y-3)^2=0
所以
x=2,y=3
而
(-y/x^3)^3÷(-1/xy)^4 X(x/y^2)^2
=-(y^3/x^9)*(x^4y^4)*(x^2/y^4)
=-x^6y^7/(x^9y^4)
=-y^3/x^3
=-3^3/2^3
=-27/8
x2+y2-4x-6y+13=0
(x²-4x+4)+(y²-6y+9)=0
(x-2)²+(y-3)²=0
x=2 ,y=3
(-y/x3)3÷(-1/xy)4 X(x/y2)2
=(-y3/x9)×(-xy)4 X(x2/y4)
=-y3/x6
=-27/64