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Harmonic Progression (H.P)

If reciprocal of each term of a progression are in A.P., then the progression is called Harmonic progression.
The standard form of a H.P. is
Description: 706.png
General Term of a H.P.
General term or nth term of a H.P. is given by
Tn = Description: 711.png
Harmonic Mean
If H.M. between two given quantities a and b be H, then a, H, b, are in H.P. then
H = Description: 716.png 

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