A. $\pi/2$
B. $2$
C. $-\pi/2$
D. $0$
.求极限 lim _(xarrow infty )dfrac (arctan x)(x)..
极限 lim _(xarrow +infty )dfrac (ln (1+dfrac {1)(x))}(arctan x)
求下列极限：lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x-|||-__求下列极限：
(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
一、单选题 1、当x→+∞时，arccotx的极限值是A. 1B. 0C. πD. -π
求下列式子的极限：lim _(xarrow +infty )((dfrac {pi )(2)-arctan x)}^dfrac (1{ln x)}-|||-__
(11) lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x
(2) lim _(xarrow +infty )((dfrac {2)(pi )arctan x)}^x;