nth Term of Binomial Expansion

If (r+1)^(th) term is (3.5...(2r-1))/(r!) (1/5)^(r) , then this is the term of binomial expansion-

Ratio Of Consecutive Terms In Binomial Expansion

If the constant term, in binomial expansion of (2x^(r) + (1)/(x^(2)))^(10) is 180, then r is equal to ___________ .

If the constant term of the binomial expansion (2x-(1)/(x))^(n) is -160, then n is equal to -

Let the coefficient of the middle term of the binomial expansion of (1+x)^(2n) be alpha and those of two middle terms of the binomial expansion of (1+x)^(2n-1) "be" beta and gamma . Which one of the following relations is correct ?

Problems Related To Coefficient Of Binomial Expansion

What is General and middle term in a binomial expansion

What is the coefficient of the middle term in the binomial expansion of (2+3x)^(4) ?