Q.
If 2x+3y−6=0 and 9x+6y−18=0 cuts the axes in concyclic points, then the centre of the circle, is
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a
(2, 3)
b
(3, 2)
c
(5, 5)
d
(5/2, 5/2)
answer is D.
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Detailed Solution
The equation of the circle passing through the points of intersection of the lines 2x+3y−6=0 and 9x+6y−18=0 with the coordinate axes is(2x+3y−6)(9x+6y−18)−(2×6+9×3)xy=0⇒x2+y2−5x−5y+6=0The coordinates of the centre are (5/2,5/2).
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