Question

Find the specified vector or scalar.
u = -4i + 1j and v = 4i + 1j; Find ||u + v||

Answer 1

A. sqrt34
B. 8
C. 5
D. 2

Answer 2

u = -4i + 1j
v = 4i + 1j
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Answer 3

to add them both, add each component

Answer 4

u = -4i + 1j
v = 4i + 1j
------------------
u+v = 0i + 2j

Answer 5

u knw how to take magnitude of that vector right ?

Answer 6

use below formula :-

\(\large \mathbb{|| xi + yj || = \sqrt{x^2+y^2}}\)

Answer 7

\(\large \mathbb{|| u + v || = ||0i + 2j|| = \sqrt{0^2+2^2} = \sqrt{0+4} = \sqrt{4} = 2}\)

Answer 8

That makes sense!! :D Thank you!!

Answer 9

good :)