$$f'(a) = \lim_{x \to a} \frac{f(x) - f(a)}{x-a}$$
$$f'(a) = \lim_{x \to a} \frac{f(x) - f(a)}{x-a}$$
$$f'(a) = \lim_{x \to a} \frac{f(x) - f(a)}{x-a}$$This is a companion discussion topic for the original entry at https://blog.datasciencedojo.com/p/a559cc86-f2a9-4c61-8698-0a225bf4b9df/