where Consider the following convolution integral y(t) = u(t) + h(t) = u(r)h(t r)dr - u(t) h(t) 0, for t <0 = u(t)=t, for

 

where Consider the following convolution integral y(t) = u(t) + h(t) = u(r)h(t r)dr - u(t) h(t) 0, for t