Mathematics · Calculus
At a local maximum of f(x), f'(x) is zero and:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1f'(x) ≠ 0
- 2f''(x) > 0
- 3f''(x) < 0✓
- 4f''(x) = 0 always
Correct answer
f''(x) < 0
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