85.70 Chapter 6. Solution of linear differential equations by Laplace transform. A Exercises at page 283

85.70.1 problem 5 (a)
85.70.2 problem 5 (b)
85.70.3 problem 5 (c)
85.70.4 problem 5 (d)
85.70.5 problem 5 (e)
85.70.6 problem 3
85.70.7 problem 4
85.70.8 problem 5