2.当 arrow 0 时,若 lim _(xarrow 0)dfrac (sqrt [4]{x)+sqrt [3](x)}({x)^k}=A(Aneq 0), 则 = __

15.计算下列极限:-|||-(1) lim _(xarrow 0)sqrt ({x)^2-4x+2} ;-|||-(3) lim _(xarrow 0)dfr

3.求下列极限:-|||-(1) lim _(xarrow 0)sqrt ({x)^2-2x+5} ;-|||-(4 lim _(xarrow 0)dfrac

求极限lim _(xarrow 0)dfrac (x)(sqrt {1-x)-1}= ()lim _(xarrow 0)dfrac (x)(sqrt {1-x)

2.设函数f(x)在区间 (-1,1) 内有定义,且 lim _(xarrow 0)f(x)=0, 则 ()-|||-A.当 lim _(xarrow 0)df

lim _(xarrow 0)dfrac (sqrt {1+5x)-sqrt (1-3x)}({x)^2+2x}= . __

(4) lim _(xarrow 0)dfrac (sqrt {x+1)-1}(x);

[题目]-|||-求 lim _(xarrow 0)dfrac (sqrt {2+tan x)-sqrt (2+sin x)}({x)^3}

已知当 arrow (0)^+ 时 sqrt ({x)^2+sin sqrt (x)} 是x的k阶无穷小则 k=A.已知当 arrow (0)^+ 时 sqrt

lim _(xarrow +infty )dfrac (sin x)(sqrt {x)}=0

03求极限 lim _(xarrow 0)dfrac (sqrt {a+x)-sqrt (a-x)}(x)(agt 0)