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The position vectors of P and Q are resp...

The position vectors of P and Q are respectively `vec a and vec b `. If R is a point on `vec(PQ) ` such that `vec(PR) = 5 vec(PQ),` then the position vector of R, is

A

`5 b - 4 a`

B

`5 b + 4a`

C

`4b -5a`

D

`4b +5a`

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A
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