Planck average energy reduce to Boltzmann energy

[War-Saw]

Hi I'm new here with new problem. I have to show how can the Planck average energy reduce to Boltzmann energy in the limit of no quantization, but I have some problems to understand how should I solve this.
If you have any ideas or answers or maybe some materials please send me a MAIL or answer here in this topic.

 

[masudr]

What do you mean exactly by the Boltzmann energy?

 

[War-Saw]

Energy from the Boltzmann Distribution