Students: Don't be deterred if you have not learnt the method of solving differential equations by separation of variables because all you have to do is to rearrange the equation in the form

ó
õ

f(v) dv =

ó
õ

f(x)dx

so that you can integrate both sides and the rest is easy integration.

Teachers:This is an example you might use to launch into work on learning the method of separation ov variables.