So I am no mathematician and have a curve the equation of which is $y=c/x$, or $c= xy$ where $c$ is a constant. I want to calculate the length of the curve between two points but my maths is not sufficient to be able to get beyond the equation for the integral.
I have $$\int \sqrt{1+ (c/x)^2} dx$$ but stuck at that point.
Anyone fancy helping out?