Question

Let u = <-7, -2>. Find 4u

a. <-28, -8>
b.<-28, 8>
c. <28, -8>
d. <28, 8>

Answer 1

a. <-28, -8>

Explanation:

Given

u = <-7, -2>

To find

4u

In order to find the value of 4u, each element of the ordered pair of the vector will be multiplied with 4

So,

4<-7, -2> = <4 * -7, 4* -2>

4u = <-28, -8>

Therefore,

4u = <-28, -8>

Option a. <-28, -8> is the correct answer ..