63.5 Chapter 1, First order differential equations. Section 1.4.1. Integrating factors. Exercises page 41

63.5.1 problem 1(a)
63.5.2 problem 1(b)
63.5.3 problem 1(c)
63.5.4 problem 1(d)
63.5.5 problem 1(e)
63.5.6 problem 1(f)
63.5.7 problem 2(a)
63.5.8 problem 2(b)
63.5.9 problem 2(c)
63.5.10 problem 2(d)
63.5.11 problem 2(e)
63.5.12 problem 2(f)
63.5.13 problem 3(a)
63.5.14 problem 3(b)
63.5.15 problem 3(c)
63.5.16 problem 3(d)
63.5.17 problem 3(e)
63.5.18 problem 3(f)
63.5.19 problem 4
63.5.20 problem 5
63.5.21 problem 6
63.5.22 problem 7
63.5.23 problem 8
63.5.24 problem 9
63.5.25 problem 12
63.5.26 problem 15(a)
63.5.27 problem 15(b)
63.5.28 problem 15(c)
63.5.29 problem 15(d)
63.5.30 problem 15(e)
63.5.31 problem 15(f)
63.5.32 problem 16-b(i)
63.5.33 problem 16-b(ii)
63.5.34 problem 16-b(iii)
63.5.35 problem 16-b(iv)
63.5.36 problem 16-b(v)
63.5.37 problem 16-b(vi)