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A (1, -1, -3), B(2, 1, -2) and C(-5, 2, ...

A (1, -1, -3), B(2, 1, -2) and C(-5, 2, -6) are the verticies of `DeltaABC`. Find co-ordinates of point D, if bisector of `angleA` intersects `bar(BC)` at point D.

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