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## AP®︎/College Calculus AB

### Unit 5: Lesson 13

Calculator-active practice

# Analyze functions (calculator-active)

AP.CALC: FUN‑4 (EU), FUN‑4.A (LO)

## Problem

The derivative of a function f is given by f, prime, left parenthesis, x, right parenthesis, equals, natural log, vertical bar, x, vertical bar, dot, x.
On which interval is the graph of f concave up?
Use a graphing calculator.