1.

Let the position vectors of two points A and B be a+b+c and a-2b+3c, respectively. If the points P and Q divide AB in the ratio 1 : 3 internally and externally respectively, then 3|AB|=

Answer»

`4 |PQ|`
`3 |PQ|`
`1/2 |PQ|`
`2 |PQ|`

ANSWER :A


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