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[" Integer answer type questions "],[" 32.The difference between the radii of the largest and the smallest circles which have their centres on "],[" circumference of "x^(2)+y^(2)+4x+2y=4" and passing through "(a,b)" lying out side the given circle is "]

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The difference between the radii of the largest and the smallest circles which have their centre on the circumference of the circle x^2+y^2+2x+4y-4=0 and pass through the point (a,b) lying outside the given circle,is

The difference between the radii of the largest and smallest circles which have their centres on the circumference of the circle x^(2)+y^(2)+2x+4y-4=0 and passes through point (a,b) lying outside the circle is:

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The x -coordinates of the centre of the smallest circle which passing through two points (2,4) and (4,9) is

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