(2) lim _(xarrow 0)dfrac (sin ({x)^n)}({(sin x))^m} (n,m为正整数);

(2) lim _(xarrow 0)dfrac (sin ({x)^n)}({(sin x))^m} (n,m为正整数),

lim _(xarrow 0)dfrac (sin 4x)(sin x)= )-|||-__lim _(xarrow 0)dfrac (sin 4x)(sin

lim _(xarrow 0)dfrac (x)(x+sin x)=（）。A.2B.1C.lim _(xarrow 0)dfrac (x)(x+sin x)=D

计算下列极限lim _(xarrow 0)(x)^2sin dfrac (1)(x)lim _(xarrow 0)(x)^2sin dfrac (1)(x)计算

lim _(xarrow 0)dfrac ({x)^2sin dfrac (1)(x)}(tan x)=A.0B.1C.lim _(xarrow 0)dfrac

利用等价无穷小的性质，求下列极限：（1）lim _(xarrow 0)dfrac (tan 3x)(2x)（2）lim _(xarrow 0)dfrac (ta

lim _(xarrow 0)dfrac (x-sin x)(x+sin x)..

(3) lim _(xarrow 0)dfrac (sin 2x)(sin 5x);

(11) lim _(xarrow 0)((dfrac {sin x)(x))}^dfrac (1{{x)^2}}

(6) lim _(xarrow a)dfrac ({x)^m-(a)^m}({x)^n-(a)^n} ,