Question

Let u
(5, -12) and C =
3. What is cu?
39
39
51
21
Done -

Answer 1

Answer:
`||cu||=39`

Explanation:

Given

`u=<5,-12>` and
`c=-3`

`cu` is a vector with 3 times the vector u in opposite direction

`|u|=√(5^2+(-12)^2)\\|u|=√(25+144)\\|u|=13`

`\therefore ||cu||=|3* 13|\\\Rightarrow ||cu||=39`

option (a) is correct.