令(x)=lim _(xarrow infty )dfrac (1-{e)^-ax}(1+{e)^-ax},则(x)=lim _(xarrow infty )d
极限lim _(xarrow infty )dfrac (1+{e)^x}(1-{e)^x}的结果是( )极限的结果是()A.1B.-1C.0D.不存在
lim _(xarrow infty )(x)^2(sqrt (dfrac {1+{x)^2}({x)^2}}-1)= __
求极限 lim _(xarrow +infty )((x+sqrt {1+{x)^2})}^dfrac (1{x)}
3.求下列函数的极限.-|||-(1) lim _(xarrow infty )x((e)^dfrac (1{x)}-1);-|||-(2) lim _(xar
根据函数极限的定义证明:(1)lim _(xarrow infty )dfrac (1+{x)^3}(2{x)^3}=dfrac (1)(2) __;(2)li
lim _(xarrow infty )x((e)^dfrac (1{2x)}-1)==
4.求下列极限:-|||-(1) lim _(xarrow infty )(e)^dfrac (1{x)} :-|||-x→∞-|||-(3) lim _(xa
求下列极限lim _(xarrow infty )dfrac ({(1+dfrac {1)(x))}^(x^2)}({e)^x}求下列极限
求:lim _(xarrow +infty )(({x)^dfrac (1{x)}-1)}^dfrac (1{ln x)}求: