Been working on revision and still waiting on my mate to bring me the notes, so in the meantime I wouldn't like stalling, anyways this is the question

Find $\displaystyle \int{\frac{1}{x^2}dx}$

The gradient of a curve is given by $\displaystyle \frac{dy}{dx}=\frac{1}{x^2}$. Find the equation of the curve, given that it passes through the point (1,3).