If a circle passes through the points (0,0),(a,0)and(0,b), then find the coordinates of its centre.

If a circle passes through the point (0,0),(a,0) and (0,b), then find its center

If a circle passes through (0,0) and ( a,0) and (0,b) , then the coordinates of its centre are

The centre of smallest circle passing through origin lies on the line x-y+1=0 then find the coordinates of its centre .

Find the equation of circle passing through the points : (0,0) ,(2,0) and (0,4) also, find its centre and radius.

A variable circle passes through the fixed point (2, 0) and touches y-axis Then, the locus of its centre, is

A variable circle passes through the fixed point (2,0) and touches y-axis then the locus of its centre is