Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT2013MathematicsStraight LinesActual

The quadratic equation whose roots are the x and yintercepts of the line passing through (1,1) and making a triangle of area A with the co-ordinate axes is

Options

  1. Ax²+A x+2 A=0
  2. Bx²-2 A x+2 A=0
  3. Cx²-A x+2 A=0
  4. DNone of these

Correct answer

B. x²-2 A x+2 A=0

Step-by-step solution

Equation of the line making intercepts a and b on the axes is x a + y b =1 Since, it passes through (1,1) 1 a + 1 ~b =1 Also the area of the triangle formed by the line and the axes is A . 1 2 ab = A ab =2 ~A From eqs. (i) and (ii), we get, a+b=2 A Hence, a and b are the roots of the eq. x²-(a+b) x+a b=0 x²-2 A x+2 A=0

Practice Straight Lines on Quantrex Academy →

More from Straight Lines

The locus of the point of intersection of the lines x=a ( 1-t^2 1+t^2 ) and y= 2 a t 1+t^2 represent (t being a parameter) 2024If the straight line 2 x+3 y-1=0, x+2 y-1=0 and a x+b y-1=0 form a triangle with origin as orthocentre, then (a, b) is equal to 2024The distance from the origin to the image of (1 , 1) with respect to the line x+y+5=0 is 2024If (-4,5) is one vertex and 7 x-y+8=0 is one diagonal of a square, then the equation of second diagonal is 2023The coordinates of the foot of the perpendicular from the point (2,3) on the line x+y-11=0 are 2023What is the angle between the two straight lines y=(2- 3 ) x+5 and y=(2+ 3 ) x-7 ? 2023If the coordinates of the points A and B be (3,3) and (7,6) , then the length of the portion of the line AB intercepted between the axes is 2023The distance between the parallel lines 3 x-4 y+7=0 and 3 x-4 y+5=0 is a b . Value of a+b is 2021 Full Straight Lines list All BITSAT PYQs