1.lim _(xarrow 0)dfrac (arctan x)(x)=

(13) lim _(xarrow 0)((dfrac {arctan x)(x))}^dfrac (1{{x)^2}}

② lim _(xarrow 0)(x)^2arctan dfrac (1)(x);

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

lim _(xarrow 0)dfrac (x-tan x)(arctan {x)^3}；；

【题目 lim _(xarrow 0)arctan dfrac (1)(x) 的极限为 ()-|||-

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

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

(9) lim _(xarrow +infty )dfrac (ln (1+dfrac {1)(x))}(arctan x)-|||-()

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

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