y是x的函数,对x求导则e^(x²)*(x²)'-2y*y'=x'*y+x*y'2xe^(x²)-2y*y'=y+x*y'y'=[2xe^(x²)-y]/(x+2y)dy/dx=[2xe^(x²)-y]/(x+2y)所以dy={[2xe^(x²)-y]/(x+2y)}dx