MathDB

7

Part of 1988 National High School Mathematics League

Problems(1)

Binomial Expansion

Source: 1988 National High School Mathematics League, Exam One, Problem 7

2/25/2020
In the binomial expansion of (x+2)2n+1(\sqrt{x}+2)^{2n+1}, sum of coefficients that power of xx is an integer is________.