Due in class Wednesday December 4.

2.6.3 #1, #3.  On #1, use the formulas given in the book (including the dollar coin) instead of what I did in class.  On #3, any method that gives a rigorous proof is acceptable: you can use generating series, induction on k, or another method.

2.6.4 #2.
2.6.5 #1, 2(b)

Extra credit: 2.6.3 #5;  2.6.4 #1(d), #5(a), #6;  2.6.5 #7