Chapter 3 - Vectors - Problems - Page 57: 9a

$a+b= [(3.0m)]\hat{i}+[(-2.0m)]\hat{j}+[(5.0m)]\hat{k}$

We add up the two vectors to obtain: $\vec{a}+\vec{b}==[(4.0m)+(-1.0m)]\hat{i}+[(-3.0m)+(1.0m)]\hat{j}+[(1.0m)+(4.0m)]\hat{k}$ $= [(3.0m)]\hat{i}+[(-2.0m)]\hat{j}+[(5.0m)]\hat{k}$