alleryUsing the sign of the second derivative at a critical point to classify it is the:
ASecond integral test
BSecond bracket test
CSecond derivative test
DSecond interval test
Answer & Solution
Correct answer: C. Second derivative test
1. A positive second derivative at a flat point means concave up.
2. Concave up at a flat point means a local minimum.
3. That classification is the second derivative test.
_Source: OpenStax Calculus Volume 1, Chapter 4, Applications of Derivatives._
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