Math Logic

Question :
What are 'Harmonic Means' ?

Answer :
When the Harmonic Progression is inverted and thereby turned into an Arithmetical progression, then after finding the required number of means by the method for Arithmetic Means, and these are inverted, they become the Harmonic Means required.
The harmonic mean is the number of variables divided by the sum of the reciprocals of the variables.
The harmonic mean H(a1.......an) of the n numbers ai (where i = 1,..,n) can be defined as:
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