If the equation of a circle is \( a x^{2}+(2 a-3) y^{2}-4 x-1=0 \) then its centre is (a) \( (2,...

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If the equation of a circle is \( a x^{2}+(2 a-3) y^{2}-4 x-1=0 \) then its centre is
(a) \( (2,0) \)
(b) \( (2 / 3,0) \)
(c) \( (-2 / 3,0) \)
(d) none of these
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