Re-organize math/series (#5044)

* added harmonic mean

* Update maths/series/harmonic_mean.py

Updated the write-up of reference given in the code.

Co-authored-by: John Law <[email protected]>

* changes in arithmetic and geometric mean code

* mean and series added in a single file

Co-authored-by: John Law <[email protected]>

Atharva Deshpande committed 4y ago

1e64bf4600e933e820701a769a453ee379c8ea2c

Parent: 08d4d22

Committed by GitHub <[email protected]> on 10/18/2021, 4:46:23 AM