The P.V.'s of A, B, C are bar(i)+bar(j)+...

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

A

`3bar(i)+2bar(j)+bar(k)`

B

`3bar(i)-2bar(j)+bar(k)`

C

`bar(i)-2bar(j)+bar(k)`

D

`3bar(i)-2bar(j)-bar(k)`

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The correct Answer is:

A

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