👉 "ffa" is a term in mathematics used to describe an inverse function. An inverse function, also known as a reciprocal function, is a function that undoes the effect of another function. In other words, if $f(x)$ and $g(x)$ are two functions defined on the same domain, then there exists a unique function $h(x)$ such that $g(x) = h^{-1}(x)$ and $h(g(x)) = f(x)$. This concept is widely