Section Number Points Comments
4.5 2 2
4 6 Show this two ways!
6 6
4.6 2(a) 3 Use the binomial theorem (don't just use a calculator!)
6 4 Don't forget to say how it's relevant to the previous problem
8 3
4.7 4 3
8 3 Assume u >= b. Hint: there's an easy answer.
9 3
4.8 3(b),(d) 4
6 3
13 4
4.10 2 3
8 3 Warning: this problem is hard (although it has a short proof)