Originally Posted by

**mr fantastic** Here are two things (the first you should already have been taught):

**Theorem:** If f(t) is a periodic function of period T then $\displaystyle \displaystyle LT[f(t)] = \frac{1}{1 - e^{-pt}} \int_0^T f(t) e^{-pt} \, dt$.

In light of the above theorem, you need to find $\displaystyle \displaystyle LT^{-1} \left[ \frac{1 - e^{-p}}{p}\right]$ and then define f(t) as an appropriate periodic function.

Now you need to think hard about these two things and then make a strong attempt at the question before asking for more help.