AP Calculus ABmediummcq1 pt
A point of inflection occurs where:
A.f'(x) = 0
B.f''(x) = 0 and the concavity changes
C.f(x) = 0
D.The function has a vertical tangent
Explanation
Core Concept
A point of inflection occurs where the second derivative is zero AND the concavity changes sign. Just having f''(x) = 0 is necessary but not sufficient.
Correct Answer
Bf''(x) = 0 and the concavity changes
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