Q.
Let $f(x) =
\begin{cases}
\frac{\ln \left(8+x^{3}\right)-\ln \left(8-x^{3}\right)}{x^{3}}, & \text{if $x \neq 0$} \\[2ex]
k, & \text{if $x=0$ }
\end{cases}$
continuous at $x = 0$, then the value of k is ______.
Continuity and Differentiability
Solution: