Question

Which of the following set of points are non- collinear
[MP PET 1990]

• A. (1, –1, 1), (–1, 1, 1), (0, 0, 1)
• B. (1, 2, 3), (3, 2, 1), (2, 2, 2)
• C. (–2,4, –3), (4, –3, –2), (–3, –2, 4)
• D. (2, 0, –1), (3, 2, –2), (5, 6, –4)

Answer 1

The correct option is C

(–2,4, –3), (4, –3, –2), (–3, –2, 4)

Check option (c), $\frac{4-(-2)}{-3-4}\ne \frac{-3-4}{-2-(-3)}$
Therefore, this set of points is non-collinear.