The
chain rule is used for
connected rates of change.
If \(y = f(u) \) and \(u = g(x) \), then:
\(\boxed{\dfrac{dy}{dx} = \dfrac{dy}{du} × \dfrac{du}{dx}} \)
Chain rule
\(\dfrac{dy}{dx} = f'\big(g(x)\big)g'(x) \)
\(\dfrac{dy}{dx} = \dfrac{dy}{du} × \dfrac{du}{dx} \)
3