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COMEDK2012MathematicsCircle

Equation of the chord of the circle x²+y²+4 x-6 y-9=0 bisected at (0,1) is

Options

  1. Ay-1=x
  2. By+1=x
  3. Cy+1=2 x
  4. Dy-1=3 x

Correct answer

A. y-1=x

Step-by-step solution

Given, equation of circle is x²+y²+4 x-6 y-9=0 Here, T=S₁x(0)+y(1)+2(x+0)-3(y+1)-9=y+1+0-6-9 y+2 x-3 y-3-9=1-15 2 x-2 y-12=1-15 2 x-2 y+2=0 x-y+1=0

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