Question

Find the sum of vector A and B
A=4i + 4j
B=4i - 8j

Answer 1

Given:

${\bf A}=4{\bf i}+4{\bf j};$

${\bf B}=4{\bf i}-8{\bf j}.$

The sum of vectors

$${\bf A}+{\bf B}=4{\bf i}+4{\bf j}+4{\bf i}-8{\bf j}=8{\bf i}-4{\bf j}.$$