I really dont understnd this vector problem. please help!
In this question, i and j are unit vectors in the direction of the positive x- and y-axes respectively.
Given that a = i – 2j and b = –3i + j find
(a) λ, if a + λb is parallel to – i – 3j
(b) μ, if μa + b is parallel to 2i + j.
in the solution bank it shows the answer worked out like this but I just dont get the working.
is parallel to if
I dont understand how they got this expression ?
This is parallel to – i – 3j if