# Integral solution

## Homework Statement

∫dr/√((1/(R+r))-(1/R))

## The Attempt at a Solution

Last edited:

gb7nash
Homework Helper
Is the problem $\int \frac{dr}{\sqrt{(\frac{1}{R}+r)-(\frac{1}{R})}}$?

If it is, try to simplify the denominator before trying to take the integral.

no,i type it wrong
∫dr/√((1/(R+r))-(1/R))

Ray Vickson
Homework Helper
Dearly Missed

## Homework Statement

∫dr/√((1/(R+r))-(1/R))

## The Attempt at a Solution

$$\int \frac{dr}{\sqrt{\frac{1}{R+r}-\frac{1}{R}}} ?$$
$$\frac{1}{R+r}-\frac{1}{R}$$
$$\sqrt{\frac{ar+b}{cr+d}}.$$