यदि $y=2 x^{n+1}+\frac{3}{x^{n}}$ है,तो $x^{2} \frac{d^{2} y}{d x^{2}}$ का मान क्या है?

  • A
    $6 n(n+1) y$
  • B
    $n(n+1) y$
  • C
    $x \frac{d y}{d x}+y$
  • D
    $y$

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यदि $y=5 \cos x-3 \sin x$ है,तो $\frac{d^2 y}{d x^2}=$ . . . . . . .

यदि $p(x)$ एक बहुपद है जो $p(2x) = p'(x) \cdot p''(x)$ को संतुष्ट करता है, तो $\sum_{x=1}^5 p(x) =$

$\frac{d^2x}{dy^2}$ का मान ज्ञात कीजिए।

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

यदि $y=A \sin x+B \cos x$ है,तो सिद्ध कीजिए कि $\frac{d^{2} y}{d x^{2}}+y=0$ है।

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