Question

1/y+1/x-y решите пожалуйста!!!

Answer 1

$frac{1}{y}+frac{1}{x-y}=frac{1*(x-y)}{y(x-y)}+frac{1*y}{y(x-y)}=frac{1*(x-y)+1*(x-y)}{xy-y^2}=frac{y+x-y}{xy-y^2}=frac{x}{xy-y^2}$