જો $5 f(x) + 3 f\left(\frac{1}{x}\right) = x + 2$ અને $y = x f(x)$ હોય,તો $x = 1$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

  • A
    $14$
  • B
    $\frac{7}{8}$
  • C
    $1$
  • D
    $7$

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Similar Questions

List-$I$ ના વિધેયોને List-$II$ માં આપેલા તેમના વિકલિતો સાથે જોડો.
List-$I$List-$II$
$A$. $\sec^{-1} x$$I$. $\frac{1}{1-x^2}, x \in (-1, 1)$
$B$. $\tanh^{-1} x$$II$. $\frac{-1}{|x| \sqrt{x^2+1}}, x \neq 0$
$C$. $\coth^{-1} x$$III$. $\frac{1}{|x| \sqrt{x^2-1}}, |x| > 1$
$D$. $\operatorname{cosech}^{-1} x$$IV$. $\frac{1}{1-x^2}, x \in R - [-1, 1]$
$V$. $\frac{-1}{|x| \sqrt{1-x^2}}, |x| < 1, x \neq 0$

જો $f^{\prime}(x) = \tan^{-1}(\sec x + \tan x)$,$\frac{-\pi}{2} < x < \frac{\pi}{2}$ અને $f(0) = 0$ હોય,તો $f(1) =$

જો $y = \sin [\cos (\sin x)]$ હોય, તો $\frac{dy}{dx} = $

Difficult
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જો $y = \tan^{-1}(\frac{1}{x^2+x+1}) + \tan^{-1}(\frac{1}{x^2+3x+3}) + \tan^{-1}(\frac{1}{x^2+5x+7}) + \dots$ $n$ પદો સુધી હોય, તો $y'(0) = $

$\frac{d}{dx} [\operatorname{cosech}^{-1}(\tan 2x)] = $

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