Number of Middle terMs in `(1+x)^(7)`

ii) Show that the coefficient of the middle term in theexpansion of (1+x)^(40) is equal to the sum of thecoefficients of two middle terms of (1+x)^(39)

Middle term of (x+1/x)^4 is 6

Prove that the coefficient of the middle term in the expansion of (1+x)^(2n) is equal to the sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)

If the coeff. of middle term of (1+x)^20 is A and coeff. of middle term of (1+x)^19 are B and C then find the value of A/(B+C)

The sum of the coefficients of middle terms in the expansion of (1+x)^(2n-1)

If the coefficient of the middle term in the expansion of (1+x)^(2n+2) is alpha and the coefficients of middle terms in the expansion of (1+x)^(2n+1) are beta and gamma then relate alpha,beta and gamma