Calculus, Artificial Intelligence, Blogging.
the left side of f(x) the curve is dropping (or decreasing) and correspondingly the f`(x) has negative values. Similarly, the right side of f(x) is increasing and its f`(x) has positive values in the gradient curve. At (0,0) the f(x) is flat so the f`(x) is also 0, indicating there is no change at