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Harmonic Progression
A Harmonic Progression (HP) is is a series of terms where the reciprocals of the terms are in Arithmetic Progression (AP).
1.The general form of an HP is 1/a, 1/(a+d), 1/(a+2d)>, 1/(a+3d), .....
2.The nth term of a Harmonic Progression is given by tn=1/(nth term of the corresponding arithmetic progression )
3.In the following Harmonic Progression:
:
4.The Harmonic Mean (HM) of two numbers a and b is
The Harmonic Mean of n non-zero numbers is:
