Q.
In an octagon ABCDEFGH of equal side, what is the sum of
$\overrightarrow{ AB }+\overrightarrow{ AC }+\overrightarrow{ AD }+\overrightarrow{ AE }+\overrightarrow{ AF }+\overrightarrow{ AG }+\overrightarrow{ AH }'$
if, $ \overrightarrow{ AO }=2 \hat{ i }+3 \hat{ j }-4 \hat{ k }$

Solution: