1.

The P.V.'s of A, B, C are bar(i)+bar(j)+bar(k), 4bar(i)+bar(j)+bar(k), 4bar(i)+5bar(j)+bar(k), then the P.V. of the incentre of DeltaABC is

Answer»

`1/3bar(i)+1/3bar(J)+1/3bar(K)`
`(BAR(i)+bar(j)-bar(k))/3`
`bar(i)+bar(j)-bar(k)`
`(bar(i)-bar(j)-bar(k))/3`

ANSWER :A


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