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

求下列极限：lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x-|||-__求下列极限：

极限 lim _(xarrow +infty )dfrac (ln (1+dfrac {1)(x))}(arctan x)

求lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x-|||-__求

求下列式子的极限：lim _(xarrow +infty )((dfrac {pi )(2)-arctan x)}^dfrac (1{ln x)}-|||-__

(6) lim _(xarrow infty )dfrac (arctan x)(x)

(2) lim _(xarrow infty )dfrac (arctan x)(x).

计算下列极限：(1) lim _(xarrow 0)(x)^2sin dfrac (1)(x);-|||-(2) lim _(xarrow infty )dfr

1.求下列极限.-|||-(4) lim _(xarrow +infty )dfrac (ln (1+dfrac {1)(x))}(dfrac {pi )(2)

求极限lim _(xarrow +infty )(({x)^dfrac (1{x)}-1)}^dfrac (1{ln x)}.求极限.

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