求极限lim _(xarrow 1)dfrac (sqrt {2x-1)-1}({x)^2-1}

2.求下列极限：4) lim _(xarrow 1)(dfrac (1)(x-1)-dfrac (2)({x)^2-1});2.求下列极限：

求lim _(xarrow infty )dfrac (ln (x+sqrt {{x)^2+1)}-ln (x+sqrt ({x)^2-1})}({({e)^d

极限 lim _(xarrow 1)dfrac ({x)^2-1}(1-x)=（ ）极限（ ）A.-2B.0C.2D.1

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

[题目]求 lim _(xarrow 2)dfrac (sqrt {3x-2)-2}(sqrt {2x-1)-sqrt (3)}

lim _(xarrow 1)dfrac (sqrt {3-x)-sqrt (1+x)}({x)^2-1}-|||-__

求极限 lim _(xarrow +infty )((x+sqrt {1+{x)^2})}^dfrac (1{x)}

求下列极限:-|||-__-|||-(3) lim _(xarrow 1)dfrac ({x)^2-1}({x)^2+2x-3};

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

求极限 lim _(xarrow +infty )dfrac (ln (x+sqrt {{x)^2+1})-ln (x+sqrt ({x)^2-1})}( l