Question

Find the specified vector or scalar.
u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖.
A. √34
B. 8
C. 2
D. 5

Answer 1

\[\large u+v=(-4i+j)+(4i+j)=2j \]
so
\[\large \lVert u+v\rVert=\sqrt{2^2}=2 \]

Answer 2

Thank you!