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y = \sqrt{x + \sqrt{x + \sqrt{x +}}} . . . . . .

\frac{d y}{d x}

এর মান কত?

\frac{1}{2 y - 1}

\frac{x}{1 - 2 y}

\frac{y}{2 y - 1}

\frac{y}{1 - 2 y}

ANS : 1

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