Question

O módulo do vetor resultante dos vetores anexo é:
u = (1,3,-2)
v = (2,-1,5)

u+v=?

( ) $18$
( ) 3
( ) 9
( ) $22$

Answer 1

$\left(\begin{array}{c}1&3&-2\end{array}\right)+\left(\begin{array}{c}2&-1&5\end{array}\right)=\left(\begin{array}{c}1+2&3-1&-2+5\end{array}\right)=\left(\begin{array}{c}3&2&3\end{array}\right)\\\\\\||u+v||=\sqrt{3^2+2^2+3^2}=\sqrt{22}$