If one circle of a co-axial system is \( x^{2}+y^{2}+2 g x+ \) \( 2 f y+c=0 \) and one limiting .... VIDEO
If one circle of a co-axial system is \( x^{2}+y^{2}+2 g x+ \) \( 2 f y+c=0 \) and one limiting point is \( (a, b) \) then
\( \mathrm{P} \)
equation of the radical axis will be
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(1) \( (g+a) x+(f+b) y+c-a^{2}-b^{2}=0 \)
(2) \( 2(g+a) x+2(f+b) y+c-a^{2}-b^{2}=0 \)
(3) \( 2 g x+2 f y+c-a^{2}-b^{2}=0 \)
(4) None of these
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