Question

If vector r = ❬4, 9❭ and s = ❬7, –5❭ then which is r – s?

r – s = ❬–3, 14❭
r – s = ❬3, –14❭
r – s = ❬–11, 4❭
r – s = ❬11, 4❭

Answer 1

(a) <-3, 14>

Explanation:

Addition and subtraction of vectors and matrices is done on a term-by-term basis.

__

The difference is ...

r - s

= <4, 9> -<7, -5>

= <4 -7, 9 -(-5)>

= <-3, 14> . . . . . . . matches the first choice