alleryIf f(x) = c (a constant), then f′(x) is:
A0
B1
Cc
Dc x
Answer & Solution
Correct answer: A. 0
1. The derivative of a constant function is ALWAYS 0.
2. Geometrically: a constant function has horizontal graph; slope = 0 everywhere.
_Source: syllabus Maths Ch 13 §13.4 Constant Rule_
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