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

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