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

  • A
    $\frac{2}{25}$
  • B
    $\frac{2}{5}$
  • C
    $\frac{-2}{5}$
  • D
    $\frac{-2}{25}$

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વિધેય $y = e^{6x} \cos 3x$ નું દ્વિતીય ક્રમનું વિકલિત શોધો.

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

જો $x^2+xy+y^2=k$ હોય, તો $\frac{d^2y}{dx^2}=$

ધારો કે $f$ એક બહુપદી વિધેય છે જેથી તમામ $x \in \mathbb{R}$ માટે $f(3x) = f'(x) \cdot f''(x)$ થાય. તો:

જો $y=x \log \left(\frac{1}{a x}+\frac{1}{a}\right)$ હોય,તો $x(x+1) \frac{d^2 y}{d x^2}+x \frac{d y}{d x}-y=$

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