Q. The equation of the chord of the circle $x^{2} + y^{2} = 81$, which is bisected at the point $( - 2,\ 3)$, is
A) $3x - y = 13$
B) $3x - 4y = 13$
C) $2x - 3y = 13$
D) $2x - 3y = - 13$
Explanation
(d)
Required equation of chord is
$T = S_{1}$
$\Rightarrow \ - 2x + 3y - 81 = 4 + 9 - 81$
$\Rightarrow \ \ 2x - 3y = - 13$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.