Connecting differentiability and continuity: determining when derivatives do and do not exist (K-A)

• Differentiability at a point: graphical (K-A)
• Differentiability at a point: algebraic (function is differentiable) (K-A)
• Differentiability at a point: algebraic (function isn't differentiable) (K-A)
• Proof: Differentiability implies continuity-notes (K-A)