# Math Help - quick differentiating quiery

1. ## quick differentiating quiery

if i do $\int \frac{dy}{dx} dy$ what does this go to... y?

2. No. If it was $\int \frac{dy}{dx}~dx$ then it would be $y + C$.
If y is a function of x, then $\frac{dy}{dx}$ is a function of x too. So $\int \frac{dy}{dx}~dy = \frac{dy}{dx}\cdot y$