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# Vectors help

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

I know i haven't written the letters

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

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

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