已知2x^2+3y^2=4x^2y^2+1,x,y为正整数,求x^2+y^2等于几

已知2x^2+3y^2=4x^2y^2+1,x,y为正整数,求x^2+y^2等于几 y*y*y*y+2x*x*x*x=4x*x*y 求x等于几,y等于几,写出所有选项! 已知x,y都为正整数,且x*x+y*y/2=1,求x*x*(1+y*y)开根号后的最大值. 已知4x=9y求(1)x+y/y (2)y-x/2x 已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 已知 2x-3y/y等于2 求x-y/2x 求x-3y/2x+y 已知正整数x,y满足2∧x 49=y,求x,y值 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-( 已知x,y为正整数,且满足2x^2+3y^2=4x^2y^2+1；则x^2+y^2=___ 已知x.y为正整数,且4x^2-9x^2=31,求x.y的值 已知xy-y^-3=0,且x,y均为正整数,求代数式2x-3y的值