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x^{2} + y^{2} - 2 g x - 2 f y + c = 0

বৃত্তের ব্যাসার্থ কত ?

\sqrt{g^{2} + f^{2} - C}

\sqrt{g^{2} + f^{2} + C}

\sqrt{g^{2} + f^{2}}

\sqrt{- g^{2} - f^{2}}

ANS : 1

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