Solution:
Two middle terms in the expansion of are th and th terms, that is, nth and (n+1)th terms.
Coefficients of the middle terms in the expansion of
are and and their
Sum of two middle terms in the expansion of is
Two middle terms in the expansion of are th and th terms, that is, nth and (n+1)th terms.
Coefficients of the middle terms in the expansion of
are and and their