Solution 2.9.1.3 F(s) = Z 1 0 f(t)e ;st dt = Z T 0 e ;st dt + Z 3T 2T e ;st dt = ;1 s h e ;st i T 0 + ;1 s h e ;st i 3T 2T = 1;e ;Ts s + e ;2Ts ;e ;3Ts s = 1;e ;Ts + e ;2Ts ;e ;3Ts s 1