[" A circle touches a straight line "ell...

[" A circle touches a straight line "ell x+my+n=0&" cuts the circle "x^(2)+y^(2)=9" orthogonally."],[" centres of such circles is: "],[[" (A) "(ell x+my+n)^(2)=(ell+m^(2))(x^(2)+y^(2)-9)," (B) "(ell x+my-n)^(2)=(ell+m^(2))(x^(2)+y^(2)-9)],[" (C) "((x+my+n)^(2)=(ell^(2)+m^(2))(x^(2)+y^(2)+9)," (D) "(ell x+my-n)^(2)=(ell^(2)+m^(2))(x^(2)+y^(2)-9)]]

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