Question

If the points (-1, 3, 2), (-4, 2, -2) and $(5,5,\lambda )$ are collinear, then $\lambda =$

• A. - 10
• B. 5
• C. - 5
• D. 10

Answer 1

The correct option is D

10

$\frac{-4+1}{5+4}=\frac{2-3}{5-2}=\frac{-2-2}{\lambda +2}or\lambda +2=12or\lambda =10$