If is a limiting point of the co-axial system of circles containing the circle

MATHEMATICS · Single correct · ISC · Mathematics · Coordinate Geometry · Coordinate Geometry

Problem

If (1,2)(1, 2) is a limiting point of the co-axial system of circles containing the circle x2+y2+x−5y+9=0x^2 + y^2 + x - 5y + 9 = 0 , then the equation of the radical axis is (1) x−9y+4=0x - 9y + 4 = 0 (2) 3x−y+4=03x - y + 4 = 0 (3) x+3y−4=0x + 3y - 4 = 0 (4) 9x+y−4=09x + y - 4 = 0

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