यदि $x = \sqrt{e^{\sin^{-1} t}}$ और $y = \sqrt{e^{\cos^{-1} t}}$ है,तो $\frac{d^2 y}{dx^2}$ क्या होगा?

  • A
    $\frac{-y}{x^2}$
  • B
    $\frac{y^2}{2x^2}$
  • C
    $\frac{2y}{x^2}$
  • D
    $\frac{-2y}{x^2}$

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$y = a \cos x + (b + 2x) \sin x \Rightarrow y^{\prime \prime} + y = $

यदि $y = {\left[ {x + \sqrt {{x^2} - 1} } \right]^{15}} + {\left[ {x - \sqrt {{x^2} - 1} } \right]^{15}}$ है,तो $\left( {{x^2} - 1} \right)\frac{{{d^2}y}}{{d{x^2}}} + x\frac{{dy}}{{dx}}$ का मान ज्ञात कीजिए।

यदि $y=\log \left(x-\sqrt{x^2-1}\right)$ है, तो $\left(x^2-1\right) y^{\prime \prime}+x y^{\prime}$ का मान ज्ञात कीजिए।

फलन $f(x) = x^{2} + 3x + 2$ का द्वितीय कोटि का अवकलज ज्ञात कीजिए।

$\frac{d^2}{dx^2}(2\cos x \cos 3x) = $

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