alleryChecking concavity through the sign of the second derivative is known as the:
AConcavity test
BContinuity test
CConvergence test
DComparison test
Answer & Solution
Correct answer: A. Concavity test
1. A positive second derivative means the slope is rising.
2. A negative one means the slope is falling.
3. Using that sign is the concavity test.
_Source: OpenStax Calculus Volume 1, Chapter 4, Applications of Derivatives._
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