Question

How to find vector -7? Thanks!

Answer 1

`-7v =56i+49j`

Explanation:

Multiplying a vector by a scalar simply means to multiply all of its components by that scalar.

So, if you start with the vector `v = ai+bj`, and multiply it by a scalar `k`, you simply get

`kv = (ak)i+(bk)j`

So,

`v = -8i-7j \implies -7v = (-8)(-7)i+(-7)(-7)j = 56i+49j`