Thread: vector question - parallelogram

The question and the solution are attached in this post.

I don't understand the solution to question a) ii., could someone please explain it to me?

Originally Posted by shawli

The question and the solution are attached in this post.

I don't understand the solution to question a) ii., could someone please explain it to me?

It's just cumbersome notation: note that since ABCD is a paralellogram, it must be that , and

putting , we get that

Tonio

Ohhh I see it ...drawing it helps.

Thank you!!