For what kind of functions/or for which functions $h(a,b)$ is the below equation true :
assumption is $\lim_{ x\to\infty }{f(x)}=l_1$, $\lim_{ x\to\infty }{g(x)}=l_2.$
When is it true that $\lim_{ x\to\infty }{h(f(x),g(x))}=h(\lim_{ x\to\infty }{f(x)},\lim_{ x\to\infty }{g(x)}) = h(l_1, l_2)$ ?