Im sudying this concepts, but i doesn't find anything clear about it, because I don't have a clear interpretation of the bandidth concept, and the number of bands in a beating wave.
$\bullet$ Bandwidth I think the definition of the bandwidth is the lower frequency, i.e. the modulator freqency., we can call it $\Delta \omega$
$\bullet$ Bandwith to transmit in a certain range For this I assumetassumed that the bandwith $\Delta \omega=\omega_{\max}$ where $\omega_{\max}$ is the higher frequency of the range we want to transmit.
$\bullet$ Number of bands with fixed bandwidth For a certain other frequency $\omega_0$ I'm not sure if this is well assumed, but for this i calculated 'how many frequencies of the bandwidth fit in one $\omega_0$' i.e. $$N=\frac{\omega_0}{\Delta \omega}$$
I dont know if this assumptions are well, because I didn't find lot of information about this in internet, and i need someone to confirm it, thanks.