Finding derivatives using chain rule from "summary" of Differential Calculus by S Balachandra Rao
The chain rule is a fundamental concept in calculus that allows us to find the derivative of composite functions. When we have a function within another function, the chain rule helps us determine how changes in the input of the outer function affect the output of the inner function. In simpler terms, it helps us break down complex functions into smaller, more manageable parts to find their derivatives.
To understand the chain rule, let's consider a function f(x) = g(h(x)), where g(x) and h(x) are both functions of x. When we want to find the derivative of f(x) with respect to x, we can't simply differentiate g(x) and h(x) separately. Instead, we need to consider how changes in x affect h(x) and how changes in h(x) affect g(x). This is where the chain rule comes into play.
The chain rule states that the derivative of a composite function f(x) = g(h(x)) is the product of the derivative of the outer function g(x) evaluated at the inner f...
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