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| [[Economics/DemandCurve#Point_Elasticity|Point elasticity]] can be differentiated with the chain rule: {{attachment:elasticity1.svg}} {{attachment:elasticity2.svg}} |
Chain Rule
The chain rule is an approach for differentiating a composition of functions in terms of those functions.
Contents
Notation
The common notation for the chain rule is, given a function h(x) = f(g(x)), the derivative h'(x) = f'(g(x)) g'(x).
An equivalent notations is that h = f ∘ g and h' = (f ∘ g)' = (f' ∘ g)g' .
A parallel notation is:
Usage
Point elasticity can be differentiated with the chain rule:
