1.

The line 2x−y+1=0 is tangent to a circle at point (2,5) and the centre of the circle lies on x−2y=4. Then the radius of the circle is ____ units.

Answer»

The line 2xy+1=0 is tangent to a circle at point (2,5) and the centre of the circle lies on x2y=4. Then the radius of the circle is ____ units.



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