81.11 Chapter 15. Method of undetermined coefficients. Page 337.

81.11.1 problem 15-1 (a)
81.11.2 problem 15-1 (b)
81.11.3 problem 15-2
81.11.4 problem 15-3
81.11.5 problem 15-4
81.11.6 problem 15-5
81.11.7 problem 15-6
81.11.8 problem 15-7
81.11.9 problem 15-8
81.11.10 problem 15-9
81.11.11 problem 15-10
81.11.12 problem 15-11
81.11.13 problem 15-12
81.11.14 problem 15-13
81.11.15 problem 15-14
81.11.16 problem 15-15
81.11.17 problem 15-16
81.11.18 problem 15-17
81.11.19 problem 15-18
81.11.20 problem 15-19
81.11.21 problem 15-20
81.11.22 problem 15-21
81.11.23 problem 15-22
81.11.24 problem 15-23
81.11.25 problem 15-24
81.11.26 problem 15-25
81.11.27 problem 15-26
81.11.28 problem 15-27
81.11.29 problem 15-28