At critical point $$c$$ where $$f'(c) = 0$$:
- Local minimum if $$f''(c) \gt 0$$
- Local maximum if $$f''(c) \lt 0$$
- Test inconclusive if $$f''(c) = 0$$
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CAT Formulas
Applications of Derivatives
Second Derivative Test
At critical point $$c$$ where $$f'(c) = 0$$:
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