78.5 Chapter 6, Linear systems. Problems section 6.9

78.5.1 problem 1
78.5.2 problem 2.a
78.5.3 problem 2.b
78.5.4 problem 2.c
78.5.5 problem 2.d
78.5.6 problem 2.e
78.5.7 problem 5.a
78.5.8 problem 5.b
78.5.9 problem 5.c
78.5.10 problem 5.d
78.5.11 problem 5.e
78.5.12 problem 5.f
78.5.13 problem 7.a
78.5.14 problem 7.b
78.5.15 problem 7.c
78.5.16 problem 7.d
78.5.17 problem 7.e
78.5.18 problem 7.f
78.5.19 problem 7.g
78.5.20 problem 7.h
78.5.21 problem 7.i
78.5.22 problem 8.a
78.5.23 problem 8.b
78.5.24 problem 8.c