Mathematics - Continuity - Differentiability Question with Solution | TestHub

Let $f(x)=\frac{{\left(e^x-1\right)}^2}{\sin \left(\frac{x}{a}\right)\log \left(1+\frac{x}{4}\right)}$ for $x\ne 0$, and $f(0)=12$. If $\mathrm{f}$ is continuous at $x=0$, then the value of $a$ is equal to