# Find the unit vector perpendicular to the plane ABC where the position vectors A, B and C are 2 i - j + k, i + j + 2 k and 2 i + 3 k.

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Find the unit vector perpendicular to the plane ABC where the position vectors A, B and C are 2 i - j + k, i + j + 2 k and 2 i + 3 k.

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Required vector