alleryA point where the derivative is zero or undefined is called a:
ACritical point
BCorner point
CCentral point
DCircular point
Answer & Solution
Correct answer: A. Critical point
1. Extrema can only hide where the slope stops behaving.
2. That means slope zero, or no slope at all.
3. Such a point is a critical point.
_Source: OpenStax Calculus Volume 1, Chapter 4, Applications of Derivatives._
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