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

  • A
    $0$
  • B
    $x\left(1-y^2\right)$
  • C
    $y\left(1-x^2\right)$
  • D
    $\sqrt{1-x^2} \sqrt{1-y^2}$

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વિધેય $f(x) = x^{20}$ નું દ્વિતીય ક્રમનું વિકલિત શોધો.

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

જો $y_k$ એ $x$ ની સાપેક્ષ $y$ નું $k$-મું વિકલિત હોય,અને $y = \cos(\sin x)$ હોય,તો $y_1 \sin x + y_2 \cos x$ ની કિંમત શોધો.

જો $y = 1 - x + \frac{x^2}{2!} - \frac{x^3}{3!} + \frac{x^4}{4!} - \dots$,હોય,તો $\frac{d^2y}{dx^2} = $

જો $y = e^{a \cos^{-1} x}$,$-1 \le x \le 1$ હોય,તો સાબિત કરો કે $(1-x^{2}) \frac{d^{2} y}{d x^{2}} - x \frac{d y}{d x} - a^{2} y = 0$.

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