√70以上 x^2 y^2 2gx 2fy c=0 338539-The circle x^2+y^2+2gx+2fy+c=0 bisects the circumference

 Best answer Let, P (h,k) be the foot of perpendicular drawn from origin O (0, 0) on the chord AB of the given circle such that the chord AB subtends a right angle at the origin The