If the vertices of a parallelogram ABCD are A (1, 2, 3), B (-1, -2, -1) and C (2, 3, 2), then find the fourth ver

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Q 1749067813.     If the vertices of a parallelogram ABCD are A (1, 2, 3), B (-1, -2, -1)
and C (2, 3, 2), then find the fourth vertex D.

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