1.

The centre and radius of the circle \[2{{x}^{2}}+2{{y}^{2}}-x=0\] are  [MP PET 1984, 87]

A. \[\left( \frac{1}{4},\ 0 \right)\] and \[\frac{1}{4}\]
B. \[\left( -\frac{1}{2},\ 0 \right)\] and \[\frac{1}{2}\]
C. \[\left( \frac{1}{2},\ 0 \right)\] and \[\frac{1}{2}\]
D. \[\left( 0,\ -\frac{1}{4} \right)\] and \[\frac{1}{4}\]
Answer» B. \[\left( -\frac{1}{2},\ 0 \right)\] and \[\frac{1}{2}\]


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