Concavity

Refer to Khan academy: Concavity introduction

Two types of concavity: Concave Up & Concave Down.

Understand function by 1st & 2nd Derivative

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Identify concavity by using Second Derivative

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Example

Solve:

• f'(x) > 0 means we're to find the INCREASING interval on the graph

• f''(x) < 0 means we'll be focusing on the CONCAVE UP shape only

• So it's about the interval of(-4, -3) and (3, 4).