Find each limit in Problems $3760.$ Note that L$$H$$pital $$s rule

does not apply to every problem, and some problems will require

more than one application of L$$H$$pital $$s rule.

$47.$ lim

xS$-1$

x

$3$

$+$x

$2$

$-$x $-1$

x

$3$

$+4$x

$2$

$+5$x$+2$