Coba jelasin Inverse function dari Fungsi (matematika) dalam bahasa sunda dong

If a function f:X→Y is bijective then preimages of any element y in the codomain Y is a singleton. A function taking y∈Y to its preimage f−1(y) is a well-defined function called the inverse of f and is denoted by f−1.

An example of an inverse function, for f(x) = 2x, is f(x)−1 = x/2. The inverse function is the function that "undoes" its original. See also inverse image.

Inverses are sometimes difficult or impossible to find. Consider f(x) = x2. The function f(x) = √x is not an inverse when the domain of f is R. (As -22 is 4, but √4 is either 2 or -2).