# How do you find the sum of Sigma 2^i where i is [1,4]?

Feb 25, 2017

This is written as:

${\sum}_{i = 1}^{4} {2}^{i}$

Which is simply all $4$ parts added up, from when $i = 1$ up to when $i = 4$:

$= {2}^{1} + {2}^{2} + {2}^{3} + {2}^{4}$

$= 2 + 4 + 8 + 16$

$= 30$