Question

Prove that:

2 * nC0 + 2^2 * nC1 / 2 + 2^3 * nC2/3 + 2^4 * nC3/4 + ... + 2^(n+1) * nCn / n+1 = 3^(n+1) -1 / n+1

Answer 1

use latex friend

Answer 2

@dan815 ,
Hmm ganshie ?

Answer 3

What is latex friend ?

Answer 4

where you type \\ [ \] before and after