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If 4î +7 +8k, 2ỉ + 39 +4k and 2 i +53 +7...

If 4î +7 +8k, 2ỉ + 39 +4k and 2 i +53 +7 k are the position vectors of the vertices A, B and C respectively of triangle ABC. The position vector of the point where the bisector of angle A meets BC, is (a) (-61 – 89 - 6k) (b){(69+89 + 6£) (0) (69 + 139 +18) (0) 4659 +12)

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