Convolution of the step function, three times

1. Nov 13, 2009

1. The problem statement, all variables and given/known data

u(t) * u(t) * u(t)

* indicates convolution

2. Relevant equations

i know u(t) * u(t) = t u(t)

3. The attempt at a solution

so (t u(t)) * u(t) = $$\int$$ $$\tau$$ d $$\tau$$ limits of integration are 0 to t
so the answer is 1/2 t^2 u(t)?

2. Nov 16, 2009

Redbelly98

Staff Emeritus
Looks good to me