यदि $y = \cos (\sin {x^2}),$ है,तो $x = \sqrt {\frac{\pi }{2}} $ पर $\frac{dy}{dx} = $

  • A
    $ -2 $
  • B
    $ 2 $
  • C
    $ -2\sqrt {\frac{\pi }{2}} $
  • D
    $ 0 $

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$f(x) = \sin^{2} x$ का अवकलज ज्ञात कीजिए।

यदि $f(x)$ एक बहुपद इस प्रकार है कि $f(x) = [f'(x)]^2$ और $f(2) = 0$, तो $f(-2) = \dots$

यदि $f''(x) = x^{1/3}$ है,तो निम्नलिखित में से कौन सा कथन सत्य हो सकता है?
$I$. $f'(x) = \frac{3}{4}x^{4/3} + 9$ $II$. $f(x) = \frac{9}{28}x^{7/3} - 2$
$III$. $f(x) = \frac{9}{28}x^{7/3} + 6$ $IV$. $f'(x) = \frac{3}{4}x^{4/3} - 4$

$\frac{d}{dx} \log |x| = ......, (x \ne 0)$

$\frac{d}{dx}({x^2} + \cos x)^4 = $

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