Chapter 1.1, Problem 4E

Suppose that ${\displaystyle \underset{i=1}{\overset{100}{\sum }}{a}_i=15}$ and ${\displaystyle \underset{i=1}{\overset{100}{\sum }}{b}_i=-12}$ . In the following exercises, compute the sums.

4. ${\displaystyle \underset{i=1}{\overset{100}{\sum }}\left(a_i+b_i\right)}$