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bara,barb are position vectors of points...

`bara,barb` are position vectors of points A and B. If P divides AB in the ratio `3:1` and Q is the mid-point of AP, then position vectors of Q will be

A

`1/2(bara-barb)`

B

`1/2(bara+barb)`

C

`1/8(5bara+3barb)`

D

`1/8(5bara-3barb)`

Text Solution

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The correct Answer is:
C
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