67.14 Chapter 21. Nonhomogeneous equations in general. Additional exercises page 391

67.14.1 problem 21.5 (i)
67.14.2 problem 21.5 (ii)
67.14.3 problem 21.6 (i)
67.14.4 problem 21.6 (ii)
67.14.5 problem 21.7
67.14.6 problem 21.8
67.14.7 problem 21.9
67.14.8 problem 21.10
67.14.9 problem 21.11
67.14.10 problem 21.12
67.14.11 problem 21.13 (a)
67.14.12 problem 21.13 (b)
67.14.13 problem 21.13 (c)
67.14.14 problem 21.13 (d)
67.14.15 problem 21.14 (a)
67.14.16 problem 21.14 (b)
67.14.17 problem 21.14 (c)
67.14.18 problem 21.15 (i)
67.14.19 problem 21.15 (ii)
67.14.20 problem 21.15 (iii)
67.14.21 problem 21.15 (c)