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OCW Scholar - Multivariable Calculus 10 Online
OpenStudy (mitsme):

Question on the Vector document, page 2, second graph. The bottom side of parallelogram has vector B that has a direction from left to right and the top side as a vector with the same direction and magnitude. Why is the top side labeled -B? I think it should be B.

OpenStudy (phi):

They wanted to show -B, but put the arrow on the wrong end.

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