13.下列极限中正确的是 ()-|||-lim _(xarrow infty )(e)^x=infty -|||-lim _(xarrow -infty )(e)^(x^2)=0-|||-lim _(xarrow infty )arctan x=dfrac (pi )(2)-|||-lim tanx = 90-|||-2

3.求下列函数的极限.-|||-(1) lim _(xarrow infty )x((e)^dfrac (1{x)}-1);-|||-(2) lim _(xar

4.求下列极限:-|||-(1) lim _(xarrow infty )(e)^dfrac (1{x)} :-|||-x→∞-|||-(3) lim _(xa

极限lim _(xarrow infty )(x)^2(2-xsin dfrac (1)(x)-cos dfrac (1)(x))=A.lim _(xarrow

lim _(xarrow infty )x((e)^dfrac (1{2x)}-1)==

求极限lim _(xarrow infty )dfrac (1+2{e)^x}(1-3{e)^2x}-|||-__-|||-lim _(xarrow {0)^+

2.求极限 lim _(xarrow infty )[ (2+x)(e)^dfrac (1{x)}-x]

.求极限 lim _(xarrow infty )dfrac (arctan x)(x)..

lim _(xarrow +infty )((1+{e)^x)}^dfrac (1{x)};

求下列极限lim _(xarrow infty )dfrac ({(1+dfrac {1)(x))}^(x^2)}({e)^x}求下列极限

令(x)=lim _(xarrow infty )dfrac (1-{e)^-ax}(1+{e)^-ax},则(x)=lim _(xarrow infty )d