Question

Elementary question.
|u+v| = ?
u=<1,3>
v=<-6,2>

Answer 1

I got <-5,5> but apparently this is not correct..I think it has to do with the | |

Answer 2

you got u+v = <-5,5> correct

but they want the length of u+v

Answer 3

oo how do I do that?

Answer 4

|v| = sqroot (a^2+b^2)

Answer 5

but how do I do |u+v| ?

Answer 6

think of u+v as one vector

Answer 7

<a,b> = <-5,5>
a = -5
b = 5

Answer 8

then you use that formula you had posted

|z| = sqrt(a^2+b^2)

z = u+v

Answer 9

would it come out to
sqroot 50 ?

Answer 10

you can simplify that

Answer 11

\[5\sqrt{2}\]

Answer 12

correct

Answer 13

Fantastic. thanks :)

Answer 14

no problem