Vivas Berrio, Diego Fernando | 18-12-30
Given some sagittal diagrams that represent functions f of A in B, it seeks to classify them and determine which ones represent functions g of B in A. It concludes that given a function f of A in B, the relation g that goes from B in A is function if and only if the function is biyective. The inverse function of f is denoted as f^-1 and is a biyective function of B in A. The -1 does not mean exponent so f^-1 is different from 1/f. In addition (f^-1)^-1= f. If a function has inverse we will say that it is invertible, in addition the domain of f is the range of f^-1 and the range of f is the domain of f^-1. Finally two procedures are given to find the inverse of an invertible function, examples are given and their respective graph is given.