If $f(x)$ is a polynomial such that $f(x) = [f'(x)]^2$ and $f(2) = 0$, then $f(-2) = \dots$

  • A
    $1$
  • B
    $-1$
  • C
    $4$
  • D
    $-4$

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If $y = \sin [\cos (\sin x)]$, then $\frac{dy}{dx} = $

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Match the functions in List-$I$ with their derivatives given in List-$II$.
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$. $\frac{1}{1-x^2}, x \in R - [-1, 1]$
$V$. $\frac{-1}{|x| \sqrt{1-x^2}}, |x| < 1, x \neq 0$

Let $f(x)$ be a differentiable function such that $f(1)=2$,$f(2)=6$ and $f(x+y)=f(x)+kxy+\frac{4}{3}y^2$ for all $x, y \in R$. Then $f(x)$ is:

$\frac{d}{d x}\left[a \tan ^{-1} x+b \log \left(\frac{x-1}{x+1}\right)\right]=\frac{1}{x^4-1}$
$\Rightarrow a-2 b$ is equal to

Let $y = \left(\frac{3^{x}-1}{3^{x}+1}\right) \sin x + \log_{e}(1+x)$ for $x > -1$. Then, at $x = 0$, $\frac{dy}{dx}$ equals:

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