求1/x^2-1/y^2=7.48*10^-7的整数解是不是需要用到matlab等工具才能解出来?是不是要求导？

x+2y=2x+y+1=7x-y 求：2x-y? (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 若x*x+y*y=x+y-1/2,求x,y的值如题 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? 求y=(2x+1)^10导数y’ 若(x+y)(x+y-1)-2=0,求x+y的值求 x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2 已知2x+y=10,求代数式((x+y)的平方-(x-y)的平方-2y(x-1/2y))/4y的值 y=arcsin(x/√1+x^2),求y' y=(1+x^2)的x次方,求y ' 求y‘-(1/x)y=x^2 的通解 y=ln(x+√x^2+1),求y y'-(1/x)y=x^2求通解 y=1/(x^2-x),求y^(n) 不解方程组2x-y=10 x+3y=1/100 求（2x-y)²-（2x-y)²（x-4y)的值 已知:【(x²+y²)-(x-y)²+2y(x-y)】/4y=1,求4x/4x²-y²-1/2x+y