InterviewSolution
Saved Bookmarks
| 1. |
Find the locus of the point P(x,y) such that the area of the triangle PAB is 5, where A is the point (1,-1) and B is the point (5,2). |
|
Answer» <P> SOLUTION : `THEREFORE` AREA of the triangle PAB is 1/2{x(-1-2) + 1(2-y) + 5(y+1)} = 1/2 (-3x+2-y+5y+5) 1/2(-3x+4y+7) = 1/2 (-3x+4y+7) = 5 or, -3x+4y+7 = 10 or, 3x-4y+3 = 0 which is the locus of the point P(x,y). |
|