HarmonicMean
HarmonicMean[data] gives the harmonic mean of the values in data.
Examples
Compute the harmonic mean:
HarmonicMean[{1, 2, 4}]
(* 12/7 *)Numerical result:
N[HarmonicMean[{1, 2, 4}]]
(* 1.71429 *)Please visit the official Wolfram Language Reference for more details.