The harmonic mean of numbers (where, ...,) is the number defined by. (1). The harmonic mean of a list of numbers may be computed in the Wolfram Language using. [ list ]. The special cases of and are therefore given by. (2). (3). and so on. The harmonic means of the integers from 1 to for, 2, ...
There are several theories about the origins of the Sanders name (see page on History Of Saunders) We believe our Sanders family originated in Scotland. Many of the early Sanders then migrated to England and Ireland and eventually to America.
Last name: Sears. Most surnames have only one or possibly two sources of origin, this surname is different - it has five! These maybe summed up as (in order of likelihood), a derivative of the pre-medieval personal name 'Saher' or 'Seir', which itself is a short form of the Norman name 'Sigiheri' introduced into England after the Conquest of 1066.