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Five vectors, vecX, vecY, vecZ, bar (OB)...

Five vectors, vecX, vecY, vecZ, bar (OB) and bar (AO) are connected as shown in figure. If bar( OB) = bar (AO), then which one of the following option is correct?

A

`vecX+vecY=2vecZ`

B

`vecX-vecY=2vecZ`

C

`vecX-vecY=3vecZ`

D

`vecY+vecZ=2vecX`

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The correct Answer is:
A
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