

InterviewSolution
Saved Bookmarks
1. |
If the points A(1, 2), B(0, 0) and C(a, b) are collinear, then(a) a = b (b) a = 2b (c) a = – b (d) 2a = b |
Answer» (d) 2a = b Points A(1, 2), B(0, 0) and C(a, b) are collinear if area of ΔABC = 0. ⇒ \(\frac{1}{2}\)[1(0 – b) + 0 (b – 2) + a (2 – 0)] = 0 ⇒ –b + 2a = 0 ⇒ 2a = b. |
|