9.lim_(xtoinfty)x^(8)/(5)(sqrt[5](x^2+2)-sqrt[5](x^2+1))=_.9.$\lim_{x\to\infty}x
(9)lim _(xarrow 0)dfrac (sqrt {1+5x)-sqrt (1-3x)}({x)^2+2x} .
lim _(xarrow +infty )x(sqrt ({x)^2+1}-x);;
lim _(xarrow 0)dfrac (sqrt {1+5x)-sqrt (1-3x)}({x)^2+2x}= . __
(5) lim _(xarrow -1)dfrac (sqrt {x+5)-2}(x+1):
求lim _(xarrow +infty )x(sqrt ({x)^2+1}-x)求
已知lim _(xarrow +infty )(x)^a[ sqrt ({x)^2+1}+sqrt ({x)^2-1}-2x] =bneq 0 x]=b≠0,则
lim _(xarrow infty )dfrac (sqrt {{x)^2+5}-3}({x)^2}--|||-○
3.求下列极限:-|||-(1) lim _(xarrow 0)sqrt ({x)^2-2x+5} ;-|||-(4 lim _(xarrow 0)dfrac
求lim _(xarrow infty )dfrac (ln (x+sqrt {{x)^2+1)}-ln (x+sqrt ({x)^2-1})}({({e)^d