# Green’s theorem double into line integral

How I can convert this double integral into line $$\int \int \frac{dx dy}{y^2}$$ we have $$\frac{dQ}{dx}-\frac{dP}{dy}=\frac{1}{y^2}$$ how to find $$Q, P$$ functions? Any two functions works? $$P=1, Q=\frac{x}{y^2}$$?

• Yes, any two do the work. – Rafa Budría Dec 3 '18 at 14:39