Question

Given v = (5, -2) and u = (6, -4), find 3v and 2u
The answers are:
(2,-6)
(-9,17)
(27,-14)
(6,13)

Answer 1

3v just means multiply each entry of v by 3
so
\[3v=3\left(\begin{matrix}5 \\ -2\end{matrix}\right)\]=\[\left(\begin{matrix}15 \\ -6\end{matrix}\right)\]
I dont see this in your answer list so you must have posted the question wrong???
maybe 3v+2u = [15,-6]+[12,-8]=[27,-14]

Answer 2

I get that it means multiply. All the other questions I was able to get the correct answer, but this one doesn't seem to add up.

Answer 3

Nevermind, I see what I did...Thanks

Answer 4

np