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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જો $y=e^{\sqrt{x \sqrt{x} \sqrt{x} \ldots}}, x>1$ હોય,તો $x=\log _e 3$ આગળ $\frac{d^2 y}{d x^2}$ ની કિંમત શોધો.

જો $y=2 \sin x+3 \cos x$ અને $y+A \frac{d^2 y}{d x^2}=B$ હોય,તો $A$ અને $B$ ની કિંમતો અનુક્રમે શું થશે?

જો $y=\tan ^{-1}\left[\frac{\log _e\left(\frac{e}{x^2}\right)}{\log _e\left(e x^2\right)}\right]+\tan ^{-1}\left[\frac{3+2 \log _e x}{1-6 \log _e x}\right]$ હોય,તો $\frac{d^2 y}{d x^2}=$

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