જો $y=\frac{2}{\sqrt{a^2-b^2}} \tan ^{-1}\left[\sqrt{\frac{a-b}{a+b}} \tan \frac{x}{2}\right]$ હોય,તો $\left.\frac{d^2 y}{d x^2}\right|_{x=\frac{\pi}{2}}=$

  • A
    $\frac{b}{2 a^2}$
  • B
    $\frac{b}{a^2}$
  • C
    $\frac{2 b}{a}$
  • D
    $\frac{b^2}{2 a}$

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જો $y = \sin(m \sin^{-1} x)$ હોય, તો $(1-x^2) y_2 - x y_1$ ની કિંમત શું થાય? (અહીં, $y_n$ એ $\frac{d^n y}{dx^n}$ દર્શાવે છે)

જો $y = a{e^x} + b{e^{-x}} + c$ જ્યાં $a, b, c$ પ્રાચલો (parameters) હોય,તો $y''' = $

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

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