STUDI DI FUNZIONI

$f\left(x\right)=\frac{x^3}{4+x^2}$         (R)	$f\left(x\right)=arctg\left(x\right)+x$         (R)	$f\left(x\right)=\sqrt{\frac{2-x}{x}}$      (R)
$f\left(x\right)=\frac{2x^3-x^2-2x+1}{x^{2 \; }}$    (R)	$f\left(x\right)=\frac{1}{\sqrt{x+3 \; }}$    (R)	$f\left(x\right)=\frac{1}{ln\left(x\right) }$    (R)
$f\left(x\right)=\frac{sin\left(x\right)+cos\left(x\right)}{2sin\left(x\right)\cdot cos\left(x\right) }$   (R)	$f\left(x\right)=\frac{\left|x\right|}{x^2-4}$    (R)	$f\left(x\right)=\frac{x^2}{e^{2x}}$     (R)
$f\left(x\right)=\frac{2sin\left(x\right)cos\left(x\right)}{sin\left(x\right)+1 }$     (R)	$f\left(x\right)=\frac{1-ln\left(x\right)}{ln\left(x\right)}$     (R)	$f\left(x\right)=\frac{1}{\sqrt{x^2-1}}$     (R)
$f\left(x\right)=\frac{x-2}{\left(x+1\right)\left(x^2-4\right)}$    (R)	$f\left(x\right)=3x^3-2x^2$    (R)	$f\left(x\right)=\frac{cos\left(x\right)}{1-cos\left(x\right)}$     (R)
$f\left(x\right)=\frac{2x-1}{x-3}$     (R)	$f\left(x\right)=\frac{ln\left(x\right)}{x}$     (R)	$f\left(x\right)=\frac{e^x}{e^x-1}$    (R)
$f\left(x\right)=\frac{x-1}{\sqrt{x^2+1}}$    (R)	$f\left(x\right)=\frac{1+x}{1-\left|x\right|}$    (R)	$f\left(x\right)=x\cdot ln\left|x\right|$    (R)
$f\left(x\right)=9x^3-4x$     (R)	$f\left(x\right)=2\cdot sin\left(x\right)-sin\left(2x\right)$    (R)	$f\left(x\right)=\frac{x-1}{x^2-2x+2}$     (R)
$f\left(x\right)=x-ln\left(x\right)$     (R)	$f\left(x\right)=e^{-x^2}$    (R)	$f\left(x\right)=\frac{x}{\sqrt{x}-1}$    (R)
$f\left(x\right)=\frac{x^3}{\left|x^2-1\right|}$    (R)	$f\left(x\right)=x+sin\left(x\right)$     (R)	$f\left(x\right)=x\cdot (x-1{)}^2$    (R)
$f\left(x\right)=\frac{cos\left(x\right)}{sin\left(x\right)-1}$    (R)	$f\left(x\right)=\frac{x-1}{x^3}$    (R)	$f\left(x\right)=x\cdot ln\left(x\right)$     (R)
$f\left(x\right)=\frac{e^{2x}}{x}$    (R)	$f\left(x\right)=\sqrt[3]{x^2+x}$    (R)	$f\left(x\right)=\sqrt{x^2+\left|x\right|}$    (R)
$f\left(x\right)=ln\left(\frac{x^2}{x-1}\right)$    (R)	$f\left(x\right)=(x^2+2x-3{)}^2$    (R)	$f\left(x\right)=\frac{sin\left(x\right)}{1+sin\left(x\right)}$    (R)
$f\left(x\right)=\frac{x^2}{{\left(x-1\right)}^2}$    (R)	$f\left(x\right)=ln\left|x^2-5x+4\right|$    (R)	$f\left(x\right)=e^{\frac{x-1}{x}}$    (R)
$f\left(x\right)=\sqrt{\frac{x-1}{x+1}}$    (R)	$f\left(x\right)=\frac{x^2}{x^2-\left|x-2\right|}$    (R)	$f\left(x\right)=\sqrt[3]{e^x-1}$    (R)
$f\left(x\right)=4x^3+2x^2$    (R)	$f\left(x\right)=cos\left(x\right)+\frac{sin\left(2x\right)}{2}$     (R)	$f\left(x\right)=\frac{2x}{x^2-1}$    (R)
$f\left(x\right)=\frac{1-2\cdot ln\left(x\right)}{x^2}$    (R)	$f\left(x\right)=\sqrt{1-e^x}$    (R)	$f\left(x\right)=\frac{x+2}{\sqrt{x^2-x}}$    (R)
$f\left(x\right)=\frac{1}{x^2+\left|x\right|}$    (R)	$f\left(x\right)=x-\sqrt{x^2-1}$    (R)	$f\left(x\right)=4x^3-x^2-14x$    (R)
$f\left(x\right)=\frac{sin\left(x\right)-cos\left(x\right)}{\sqrt{3}sin\left(x\right)-cos\left(x\right)}$   (R)	$f\left(x\right)=\frac{2x-1}{2x^3}$   (R)	$f\left(x\right)=x^2\cdot ln\left(x\right)$    (R)
$f\left(x\right)=\frac{e^x}{2-x}$    (R)	$f\left(x\right)=\sqrt[3]{x^2-x}$    (R)	$f\left(x\right)=arctg\left(\frac{1}{\left|x\right|}\right)$    (R)
$f\left(x\right)=\frac{x^2-2x-1}{x^2+1}$   (R)	$f\left(x\right)=25x^3\cdot {\left(x-1\right)}^2$    (R)	$f\left(x\right)=arcsin\left(1-2x\right)$   (R)
$f\left(x\right)=\frac{x^2}{x+1}$   (R)	$f\left(x\right)=\frac{x\cdot ln\left(x\right)}{1+ln\left(x\right)}$    (R)	$f\left(x\right)=\frac{e^{2x}}{e^x+1}$   (R)
$f\left(x\right)=\frac{x}{\sqrt{1-x^2}}$   (R)	$f\left(x\right)=\left|x+1\right|e^{-2x}$    (R)	$f\left(x\right)=\frac{1-sin\left(x\right)}{cos\left(x\right)}$   (R)
$f\left(x\right)=\sqrt{x^2-\left|x\right|}$   (R)	$f\left(x\right)=sin\left(x\right)-cos\left(2x\right)$    (R)	$f\left(x\right)=\frac{x^2}{\left|x+1\right| }$$\begin{array}{c}\mathrm{}\end{array}$   (R)
$f\left(x\right)=\sqrt{x^3-ln\left(x\right)}$    (R)