MC$03$

$".3.31$: $$

$,,$ C$,$:

$=\{-3,0,1,4,17\}$

$=\{-12,-5,1,4,6\}$

C $=\{$ in $$: $\}$

$=\{$ in $$: $$ positive$\}$

$,,,$

$()$

$$

$()$

$($ C$)$

$()$

$"$