defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Circles Elements of a Circle

Centre and radius of circle \(\rm 3x^2+3y^2-3x-18=0\) respectively are 

1
 (\(\frac12\), 0) and \({\frac{5}{2}}\) units
2
 (\(\frac32\), 0) and \({\frac{\sqrt5}{2}}\) units
3
 (\(1\), 0) and \({\frac{1}{2}}\) units
4
 (\(\frac14\), 0) and \(6\) units
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