Introduction to 3DHard
Question
The co-ordinates of points A, B, C, D are (a, 2, 1), (1, −1, 1), (2, −3, 4) and (a + 1, a + 2, a + 3) respectively. If AB = 5 and CD = 6, then a =
Options
A.2
B.3
C.− 2
D.− 3
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