Section 2.3

You are responsible for reproducing the following proofs on a test:
Theorem 2.3.1
Theorem 2.3.2
Theorem 2.3.3 (also called "the new, improved power rule") We won't see the proof until the next section.

Memorize the fact in formula (6) on the bottom of p. 156. This will help you in homework problems 6, 10, 11, 12, 54 and problems in later sections.