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

Answer: (D)

10

Answer 2

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