ધારો કે, $f(x)=e^{-\sqrt{x}}+e^{-\frac{1}{x^2}}$. જો $f^{\prime \prime}(x)=\alpha \cdot \frac{e^{-\sqrt{x}}}{x}\left(1+\frac{1}{\sqrt{x}}\right)+\beta \cdot \frac{e^{-\frac{1}{x^2}}}{x^4}\left(3-\frac{2}{x^2}\right)$, તો $(\alpha, \beta)=$

  • A
    $\left(\frac{1}{4}, 2\right)$
  • B
    $\left(\frac{1}{4},-2\right)$
  • C
    $\left(-\frac{1}{4}, 2\right)$
  • D
    $\left(-\frac{1}{4},-2\right)$

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ધારો કે $f$ એક બહુપદી વિધેય છે જેથી તમામ $x \in \mathbb{R}$ માટે $f(3x) = f'(x) \cdot f''(x)$ થાય. તો:

જો $y=\tan ^{-1}\left(\frac{\sqrt{1+a^2 x^2}-1}{a x}\right)$ હોય, તો $\left(1+a^2 x^2\right)y''+2 a^2 x y'$ ની કિંમત શોધો.

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