8.1 recurrence relations
#8
#12
8.2 linear recurrence
#2
#4 only a, b, c, and d #48
8.3 divide and conquer
#12
#14
#22
8.5 inclusion exclusion
#16
#22
8.6 Applications of Inclusion Exclusion #4
9.1 Relations
#6
#10
#50
9.5 equivalence relations
#2
#48
9.6 partial orders
#4
#24
