Q9 / 105 · NTA Abhyas (JEE Main) 2020 · Mathematics · Circle

The centre of the circle passing through the points of intersection of the curves 2x+3y+43x+2y-1=0 and xy=0 is

  • A
    ( 56,-512)
  • Correct answer
    B
    -56,-512
  • C
    512,-56
  • D
    -512,56

Solution

Family of curves passing through points of intersection of curves 2x+3y+43x+2y-1=0 and xy=0 is
2x+3y+43x+2y-1+λxy=0
⇒ 2x2+y2+13xy+10x+5y-4+λxy=0 .... (1)
If equation 1 represents a circle then coefficient of xy is zero ⇒λ=-13
⇒ equation of circle is x2+y2+53x+56y-23=0
⇒ center of the circle is -56,-512

Hence, the correct answer is option: 'B'.

More Circle Questions