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I know this problem is easy but im having some trouble. If someone could point me in the right direction i would be really grateful.

Suppose (vector)C=(vector)A + (vector)B

a) under what circumstances does [A]=+[C]?

b) Could [C]=[A]-?

( [ ]= absolute value)

Ok. For A i think that A and B would have to have the same signs but Im really not to sure.

For B i cant see how C=A+B can be equal to [C]=[A]-. It seems like a simple contradiction, which usually means im wrong. :tongue2:

I would really apprecitate some help!!!!

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# Homework Help: Simple Vector Problem. Help please!

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