Differentiability at a point: algebraic (function isn't differentiable)

Differentiable Function: Meaning, Formulas and Examples | Outlier

Describe several ways in which a function can fail to be differentiable. Illustrate with sketches.

Differentiability of Functions | Overview, Equation & Examples

Answered: What is the rule for calculating the derivative of a composition of two differentiable functions? How is such a derivative evaluated? Give examples. | bartleby

Using Derivatives to Verify a Function is the Solution to a Differential Equation | Calculus | Study.com