show that the function

$$

$($

$$

$)$

$=$

$$

$2$

$+$

$3$

$$

$3$

f$($n$)=$n

$2$

$+3$n

$3$

is in both

$$

$($

$$

$3$

$)$

O$($n

$3$

$)($big$-$O$)$ and

$\backslash$Omega

$($

$$

$3$

$)$

$\backslash$Omega $($n

$3$

$)$