MCQ
यदि $y=x \cdot \log _{ e ^{ x }}$ तो $\frac{d^2 y}{d x^2}$ का मान होगा
- A$\frac{1}{1+x}$
- B$\frac{1}{x}$
- C$\log (1+x)$
- D$1+\log x$
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