Choose the best answer for the limit$.$

If

ModifyingBelow font size increased by $1$ lim With x right arrow $3$ Superscript minus f left parenthesis x right parenthesis equals $2$limx$3$f$($x$)=2$

and

ModifyingBelow font size increased by $1$ lim With x right arrow $3$ Superscript plus f left parenthesis x right parenthesis equals $5$limx$3+$f$($x$)=5,$

then

ModifyingBelow font size increased by $1$ lim With x right arrow $3$ f left parenthesis x right parenthesislim$$x$3$f$($x$)$

$\_\_\_\_\_.$