The Student Room Group

Vectors help

A -5-10+12
B 1+2-3
C 3+6+p

I know i haven't written the letters :wink:

Anyways if ABC is a straight line why is the value of p -8? I just persume its -9 :/
Reply 1
AB = 3(2i +4j-5k)

BC = 2i +4j +(p--3)k.
Got it :smile: Thanks :smile:

Quick Reply

Latest