Using the Midpoint of a Vector formula | MAS111A

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Follow on from my video deriving the midpoint formula, this video is a demonstration of how to use the formula.
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Isn't vector AB = OB - OA? You're trying to find the difference between the two points. So it would be <12-4, 9-3> = <8, 6> = AB
Then to find the midpoint its 1/2<8, 6> = <4, 3>

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Isn’t your answer wrong shouldn’t it be (4, 3)

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