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যদি y=

\frac{1 n x}{x}

\frac{d^{2} y}{d x^{2}}

এর মান কোনটি?

\frac{2 \ln x + 3}{x^{3}}

\frac{2 \ln x - 3}{x^{3}}

\frac{2 \ln x + 5}{x^{3}}

\frac{2 \ln x + 3}{x^{2}}

\frac{2 \ln x + 3}{x^{2}}

ANS : 2

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