If f(x) is differentiable, then the solu...

If `f(x)` is differentiable, then the solution of `dy+f\'(x)(y-f(x))dx=0` is (A) `yf(x)=Ce^(-f(f(x))^2)` (B) `y+1=f(x)+Ce^(-f(x))` (C) `f(x)=Cye^(-y^2/2)` (D) none of these

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