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y = 1 n (x + \sqrt{x^{2} + 4})

\frac{d y}{d x}

এর মান -

\sqrt{x^{2} + 4}

\frac{1}{1 + \sqrt{x^{2} + 4}}

\frac{1}{\sqrt{x^{2} + 4}}

1 + \sqrt{x^{2}} + 4

ANS : 3

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