El teorema de Fermat del análisis (Demostración)

Proof of Fermat's Theorem or the Interior Extremum Theorem. Relevant definition to understand this proof: Lateral derivatives Relevant proposition f is derivable at x if and only if the lateral derivatives exist and coincide PayPal https://www.paypal.com/donate/?hosted... For more videos, subscribe to:    / @mate_a   Follow me on:   / mate-a-280220872612223   To support me, subscribe to my channel and like this video. Thank you. This video was designed with iPad Pro and Goodnotes