18 Chapter 7.9, Nonhomogeneous Linear Systems. page 447

  18.1 problem 1
  18.2 problem 2
  18.3 problem 3
  18.4 problem 4
  18.5 problem 5
  18.6 problem 6
  18.7 problem 7
  18.8 problem 8
  18.9 problem 9
  18.10 problem 10
  18.11 problem 11
  18.12 problem 12
  18.13 problem 13
  18.14 problem 18