6a. Show that 2/n = 1/3n + 5/3n and use this identity to obtain
the unit fraction decompositions of 2/25 , 2/65 , and 2/85 as given
in the 2/n table in the Rhind Mathematical Papyrus.
6b. Show that 2/mn = 1/ (m ((m+n)/ 2 )) + 1/ (n ((m+n)/ 2 )) and
use this identity to obtain the unit fraction decompositions of 2/7
, 2/35 , and 2/91 as given in the 2/n table in the Rhind
Mathematical Papyrus....