9
(Choose 1 answer)
A. (-1, 2, 3)
Let A(3,-1,-1), B(1,-2,0), C(1,-1,2) be three vertices of the parallelogram with two adjacent sides AB and AC.Find the fourth vertex.
B. None of the other choices is correct
C. (-1, -2, -3)
D. (1, -2, 3)
E. (-1, -2, 3)
