subcontrary mean

The harmonic mean H(x_1, ..., x_n) of n numbers x_i (where i = 1, ..., n) is the number H defined by 1/H congruent 1/n sum_(i = 1)^n 1/x_i. The harmonic mean of a list of numbers may be computed in the Wolfram Language using HarmonicMean[list]. The special cases of n = 2 and n = 3 are therefore given by H(x_1, x_2) | = | (2x_1 x_2)/(x_1 + x_2) H(x_1, x_2, x_3) | = | (3x_1 x_2 x_3)/(x_1 x_2 + x_1 x_3 + x_2 x_3), and so on.

arithmetic-geometric mean | arithmetic mean | geometric mean | harmonic-geometric mean | harmonic range | power mean | Pythagorean means | root-mean-square