Question

||2u|| if u=2i-7j

Answer 1

So you're looking for the norm of the vector
\[||u|| \implies \sqrt{(2)^2+(-7)^2}\]

Answer 2

By norm you mean magnitude right?

Answer 3

Now remember there is a 2 there

Answer 4

Yes multiply by 2 :)

Answer 5

@Astrophysics so I got ||u||=sqrt53
So would I then multiply that by 2?