Let L be the line passing through the point P 1 , 2 such that its intercepted segment between the…

Let L be the line passing through the point P1,2 such that its intercepted segment between the co-ordinate axes is bisected at P. If L1 is the line perpendicular to L and passing through the point -2, 1, then the point of intersection of L and L1 is
  1. 35,2310
  2. 45,125
  3. 1120,2910
  4. 310,175

Solution

If P is the midpoint of the segment between the axes, them point  A2, 0 and B0, 4.

The equation of the line is, x2+y4=1

or, 2x+y=4   1

The line perpendicular to it is of form, x-2y=k

Since it passes through (-2, 1),

 -2-2=kk=-4

Line is, x-2y=-4      2 

Solving 1 and 2 we get 45,125.

Asked in: JEE Main 2015 (10 Apr Online)

Practice more Straight Lines questions on Aicharya