यदि $y = \log(\cosh x)$ है,तो $\frac{d^2 y}{d x^2} = $

  • A
    $\operatorname{sech}^2 x$
  • B
    $-\operatorname{sech}^2 x$
  • C
    $\sinh x$
  • D
    $-\sinh x$

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Similar Questions

यदि फलन $y = \sin^{-1} x$ है,तो $\left(1-x^2\right) \frac{d^2 y}{d x^2}$ का मान क्या होगा?

$\begin{aligned} & y=\sin \left(\log \left(x^2+2 x+1\right)\right) \\ & \Rightarrow(x+1)^2 \frac{d^2 y}{d x^2}+(x+1) \frac{d y}{d x}= \end{aligned}$

$\frac{d^2x}{dy^2} = $

मान लीजिए $\cos ^{-1}\left(\frac{y}{b}\right)=\log _e\left(\frac{x}{n}\right)^n$. तो $A y_2+B y_1+C y=0$ किसके लिए संभव है:

यदि $y^{2}=a x^{2}+b x+c$,जहाँ $a, b, c$ स्थिरांक हैं,तो $y^{3} \frac{d^{2} y}{d x^{2}}$ किसके बराबर है?

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