. The line
lx+my+n= 0 is normal to the circle x2+y2+2gx+2fy+c=0, if
Best Answer
Answer: Since normal always passes through centre of circle, therefore (-g,-f) must lie on lx+my+n=0 . hence lg+mf-n=0
Related questions
lx+my+n= 0 is normal to the circle x2+y2+2gx+2fy+c=0, if
Answer: Since normal always passes through centre of circle, therefore (-g,-f) must lie on lx+my+n=0 . hence lg+mf-n=0
