Question

X平方+Y平方-4X-6Y+13=0 求X的负Y次方等于多少

Answer 1

x²+y²-4x-6y+13=0

x²-4x+4+y²-6y+9=0

(x-2)²+(y-3)²=0

平方数不小于0

所以有

x-2=0,y-3=0

x=2,y=3

x^-y=2^(-3)=1/(2^3)=1/8