HW Set 3 (assigned Tuesday Sept 15, 2009)
Problems for quiz 3 (week of Sept 21, 2009)

Sec 2.5 # 4, 9, 16, 20, 23, 24, 31, 32

Sec 2.6 # 5, 7, 13, 19, 20, 29, 32, 33, 36

Sec 2.7 # 4, 6, 21, 25, 27, 35, 41, 43