discrete math

4.2  4 a (use induction) b (do not use induction), 6 (write it as a summation [using SIGMA] first), 8 (just write the summation using SIGMA — no need to do the actual proof!), 14, 15b, 19, 24

4.3  2 cd, 4 abc (for (c) find a C and k and show that they work for your answer), 6, 10, 11b, 16