Homework #3 problems (the material here will covered on exam #1)

Section 2.3 15, 19, 20, 23, 27, 28, 29, 31, 32, 35 40,

Section 2.4: 1, 6, 10, 12, 19, 23, 27, 28, 32, 33, 37, 41, 53, 57,64