# Planck's Function

Using planck's energy density per unit frequency formula. r(x)= x^3 / e^x -1. Plot r(x) from excel spread sheet and determine its maximum. I need help in using excel to graph this in order to find the maximum. Then based on the maximum I am supposed to determine planck's constant.

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#### Solution Summary

The solution uses planck's energy density per unit frequency formula to determine the answer.

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