👉 In mathematics, an "inevaiblly" or "non-constant" function is a function that does not have a constant value for every input. In other words, it has values at all inputs. This means that there are no values of \(x\) such that the function returns a specific value for every input. For example, consider the function \(f(x) = 2x^3 - x\). We can see that this function does not have any constant values for