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