Saved Bookmarks
| 1. |
The coordinates of a point on the line `(x-1)/(2)=(y+1)/(-3)=z` at a distance `4sqrt(14)` form the point (1, -1,0), isA. `(-13,9,4)`B. `(-7, 11,-4)`C. `(11,-7,-4)`D. None of these |
|
Answer» Correct Answer - 2 Any point on the given line is `rArr Q (2lambda + 1,-3lambda-1,lambda)` & P(1,-1,0) Given `PQ =4sqrt(4)` `rArr (2lambda)^(2) + (-3lambda)^(2)+lambda^(2) = (4sqrt(14))^(2)` `rArr 14lambda^(2) = 16 xx14` `rArrlambda = pm 4` `therefore` Coordinates are `rArr (9,-13,4) & (-7, 11,-4)` |
|