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A(3, 2, 0), B(5, 3, 2), C(-9, 6, -3) are...

A(3, 2, 0), B(5, 3, 2), C(-9, 6, -3) are three points forming a triangle and AD, the external bisector of BAC, meeting BC at D then find D.

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The correct Answer is:
`((19)/(8),(57)/(16),(17)/(16))`
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