👉 In mathematics, a function \(f\) is said to be derivable at \(a\) if there exists a real number \(c\) such that \(f'(c) = 0\), where \(f'\) denotes the derivative of \(f\). This means that for any given value of \(x\), the change in \(f(x)\) divided by the difference in \(x\) is equal to zero. In other words, a function \(f\) is derivable at \(
