已知lim _(xarrow {x)_(0)}varphi (x)=0，则下列结论正确的个数为lim _(xarrow {x)_(0)}varphi (x)=0lim _(xarrow {x)_(0)}varphi (x)=0lim _(xarrow {x)_(0)}varphi (x)=0lim _(xarrow {x)_(0)}varphi (x)=0当lim _(xarrow {x)_(0)}varphi (x)=0时，lim _(xarrow {x)_(0)}varphi (x)=0lim _(xarrow {x)_(0)}varphi (x)=0若lim _(xarrow {x)_(0)}varphi (x)=0则lim _(xarrow {x)_(0)}varphi (x)=0

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

已知 lim _(xarrow 0)([ 1+x+dfrac {f(x))(x)] }^dfrac (1{x)}=(e)^3, 则 lim _(xarrow 0

154 设 lim _(xarrow {x)_(0)^+}f(x)=lim _(xarrow {x)_(0)^-}(x)=a, 则-|||-(A)f(x)在 =

(B)若 lim _(xarrow 0)dfrac (f(x)+f(-x))(x) 存在,则 (0)=0.-|||-(C)若 lim _(xarrow 0)df

[题目]已知 lim _(xarrow 0)dfrac (sin 6x+xf(x))({x)^3}=0, 求 lim _(xarrow 0)dfrac (6+f

已知f(x)满足 lim _(xarrow 1)dfrac (f(x))(ln x)=1, 则 () .-|||-(A) f(1)=0 (B) lim _(xa

(14) lim _(xarrow {0)^+}(x)^sin x;

已知lim _(xarrow +infty )(x)^a[ sqrt ({x)^2+1}+sqrt ({x)^2-1}-2x] =bneq 0 x]=b≠0，则

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

极限lim _(xarrow 0)dfrac ({int )_(0)^(x^2)(e)^tdt}(2x)=()A、 lim _(xarrow 0)dfrac (