4.1 SOLUTIONS
191
CHAPTER FOUR
Solutions for Section 4.1
1. We find a critical point by noting where f (x) = 0 or f is undefined. Since the curve is smooth throughout, f is always
defined, so we look for where f (x) = 0, or equivalently where the tangent
1.1 SOLUTIONS
1
CHAPTER ONE
Solutions for Section 1.1
1. (a) The story in (a) matches Graph (IV), in which the person forgot her books and had to return home.
(b) The story in (b) matches Graph (II), the flat tire story. Note the long period of time durin
4.1 SOLUTIONS
191
CHAPTER FOUR
Solutions for Section 4.1
1. We nd a critical point by noting where f (x) = 0 or f is undened. Since the curve is smooth throughout, f is always
dened, so we look for where f (x) = 0, or equivalently where the tangent line t