Section	Exercises
12.4	p.801: 3, 7, 13, 14, 15, 17, 25, 27, 29, 30, 32, 33, 37, 40, 51, 53, 56, 57, 59
12.5	p.813: 2, 4, 11, 21, 31, 33, 45, 46, 49, 54, 55, 56, 64; p.845: 16
12.6	p.828: 1, 6, 10, 18, 23, 34, 42, 47, 49, 50, 54 (to compute the derivatives, differentiate both sides of the equation w.r.t. \(x\))