Question

u = -4i + 1j and v = 4i + 1j; Find ‖u+v‖ ? much help needed. Find the specified vector or scalar.

Answer 1

\[u+v=-4i+1j+4i+1j=-4i+4i+1j+1j=0i+2j\]

from here use the following equation
\[||ai+bj||=\sqrt{a^2+b^2}\]

Answer 2

\[\left| u+v \right|=\sqrt{0^2+2^2}=2\]

Answer 3

Thank you!

Answer 4

yw did u understand?

Answer 5

sum of two vectors is always a vector.

Answer 6

that formual comes from pythagorean theorem(for magnitude):