Sec. 7, 6.3-6.4, due February 13

The main thing that I found difficult was the strong principle of mathematical induction.  They took some integer i such that m<=i<=k and then never really seemed to use it in the proof.  It also seems as if finding out the minimum value of k to be used in the proofs was obtained by guessing and then checking.  Hopefully there is a faster way than having to run through the first few values allowed by the domain.