把已知条件y^(-4)改成y(-2)的话,按下列求已知:(x-1/x)2+(y-1/y)2=0,即,x=1/x,y=1/y;只有正负1满足,故所求式=2
已知x²+y²+x^(-2)+x^(-2)+y^(-4)-4=0,求(y²/x²
1个回答
相关问题
-
1)已知x^2+y^2-2x+4y+5=0,求x^4-y^4/(x+y)(2x-y)`2x-y/x
-
已知x^2+y^2-2x+4y+5=0.求{(x^4-y^4)/[(x+y)(2x-y)]}*{[(2x-y)/(xy-
-
已知x,y满足x2+y2-4x+y+4.25=0 求(x+y)2
-
已知x^2+y^2-2x+4y+5=0,求(x^4-y^4)/(x^2-2xy+y^2)*(x-y
-
已知x^2+4y^2-4x+4y+5=0,求(x^4-y^4/2x^2+xy-y^2)*(2x-y/xy-y^2)/(x
-
已知x>0 y>0 x²+4y²+x+2y=4 求x+2y最大值
-
1.已知x^2+2x+1+y^2-4y+4=0,求x,y.
-
已知x²+y²-6x+4y+13=0,求(2x-y)²-2(2x-y)(x+2y)+(x+
-
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
-
已知x2-4x-y2-10+29=0,求:x²y²+2x³y²+x^4y²的值