Hwk 4: October 17th.

• Section 9.1: 1, 2 , 3, 5, 9 , 13, 20, 23 , 24, 27 .
• Section 9.2: 1, 3, 7, 11, 15, 17, 23, 25, 27, 31, 35, 40, 42.
• Section 9.3: 1, 2, 3, 7, 9, 11, 13, 14, 27 ,31, 33, 35, 37, 38.
• Section 9.4: 1, 2, 3, 6, 7, 9, 19, 27, 29, 33, 40, 46, 47, 49.