Question

If v=[87] and c = 4, then which of these is the vector cv? A

[327]


B

[828]


C

[1211]


D

[3228]

Answer 1

D [32 28]

Explanation:

We have the following vector:

v = [8,7]

Multiplying a vector by a constant is the same as multiplying all of the elements of the vector by the constant.

We have a constant c = 4.

So

cv = 4[8,7] = [32,28]

So the correct answer is:

D [32 28]