We now find the maximum of $f(u)$ on this interval. Note that as $u \to 0^+$, $f(u) \to \infty$, but we must check whether a maximum occurs within the interval or at an endpoint. However, since all terms grow unbounded as $u \to 0$, but we must evaluate whether a minimum exists and whether the expression becomes large — yet we seek the **maximum**, which may occur near $u \to 0$, but let’s analyze behavior. - Appfinity Technologies