જો $y = \cos^{2}\left(\frac{5x}{2}\right) - \sin^{2}\left(\frac{5x}{2}\right)$ હોય,તો $\frac{d^{2}y}{dx^{2}} = $

  • A
    $-5 \sqrt{1-y^{2}}$
  • B
    $5 \sqrt{1-y^{2}}$
  • C
    $25 y$
  • D
    $-25 y$

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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 $(\alpha, \beta)=$

વિધેય $f(x) = \log x$ નું દ્વિતીય ક્રમનું વિકલિત શોધો.

જો $y = a{e^{mx}} + b{e^{ - mx}}$ હોય,તો $\frac{d^2y}{dx^2} - m^2y = $

જો $y=a \cos (\log x)+b \sin (\log x)$, જ્યાં $a, b$ પ્રાચલો છે, તો $x^2 y^{\prime \prime}+x y^{\prime}$ ની કિંમત શોધો.

જો $\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1$ હોય,તો $\frac{d^2 y}{d x^2}$ શું થાય?

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