极限
的结果是（ ）
A.1 B.-1 C. 0 D.不存在
极限的结果是（ ）
A.1 B.-1 C. 0 D.不存在
令(x)=lim _(xarrow infty )dfrac (1-{e)^-ax}(1+{e)^-ax},则(x)=lim _(xarrow infty )d
lim _(xarrow +infty )((1+{e)^x)}^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
求极限lim _(xarrow 0)(dfrac (1+x)(1-{e)^-x}-dfrac (1)(x)).求极限.
求下列极限lim _(xarrow infty )dfrac ({(1+dfrac {1)(x))}^(x^2)}({e)^x}求下列极限
4.求下列极限:-|||-(1) lim _(xarrow infty )(e)^dfrac (1{x)} :-|||-x→∞-|||-(3) lim _(xa
求极限 lim _(xarrow +infty )((x+sqrt {1+{x)^2})}^dfrac (1{x)}
求极限lim _(xarrow infty )dfrac (1+2{e)^x}(1-3{e)^2x}-|||-__-|||-lim _(xarrow {0)^+
3.求下列极限.-|||-(3) lim _(xarrow {0)^+}dfrac (1-{e)^dfrac (1{x)}}(x+{e)^dfrac (1{x)
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