# Leibniz rule of integration

1. Feb 12, 2009

### GhostSpirit

How can I apply Leibniz rule of integration to solve the integral
$$\int_0^t{f\left(t\right)\dot{a}^2\left(t\right)dt}$$
I want to get rid of $$\dot{a}$$??

2. Feb 12, 2009

### GhostSpirit

I am sorry, I meant I want to get rid of $$\dot{a}^2$$. Is there any answer to solve this integral? I can have $$\dot{f}$$ in the answer.

Thanks,