Question

Find the specified vector or scalar. Show your work.

u = -4i + 1j and v = 4i + 1j; Find .||u+v||

Answer 1

@freckles

Answer 2

Find what?

Answer 3

idk let me ask my teacher thats how the question was given to me

Answer 4

||u+v||

Answer 5

@freckles

Answer 6

(ai+bj)+(ci+dj)
=(a+c)i+(b+d)j

then to find the magnitude of that sum
you do
\[\sqrt{(a+c)^2+(b+d)^2}\]

Answer 7

ok this is my first time doing this soo

Answer 8

i dont know what to do ?

Answer 9

@mathmath333

Answer 10

@freckles

Answer 11

@skullpatrol

Answer 12

add the i-components

Answer 13

-4+4=?

Answer 14

then add the j-components
1+1=?

Answer 15

\[u+v=(-4+4)i+(1+1)j\]

Answer 16

1+1= 2 and -4+40

Answer 17

sorry -4+4=0

Answer 18

ok so you saying u+v=0i+2j
or just u+v=2j

Answer 19

now how far is that from the origin ?