[题目]已知 lim _(xarrow infty )(dfrac ({x)^2}(x+1)-ax-b)=0, 其中a,b是常-|||-数,则 ()-|||-

[题目]若 lim _(xarrow infty )(dfrac ({x)^2+1}(x+1)-ax-b)=0, 求a,b的值.

(2) lim _(xarrow infty )((dfrac {x+1)(x-1))}^-dfrac (x{2)}= () ;-|||-(A)1 (B) ^d

(3)已知极限 lim _(xarrow +infty )(dfrac ({x)^2}(x+1)-x-a)=2, 则常数a是(

[题目]-|||-lim _(xarrow infty )((dfrac {x+3)(x-1))}^x+1

设 lim _(xarrow 0)dfrac (ln (1+x)-(ax+b{x)^2)}({x)^2}=2, 则设 lim _(xarrow 0)dfrac

令(x)=lim _(xarrow infty )dfrac (1-{e)^-ax}(1+{e)^-ax},则(x)=lim _(xarrow infty )d

(7)已知极限 lim _(xarrow +infty )(dfrac ({x)^2}(x+1)-x-a)=2, 则常数a是 () 。(2017会计选择2 )-

(14) lim _(xarrow infty )((dfrac {x+2)(x+1))}^x;

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

[题目] lim _(xarrow infty )((1+dfrac {2)(x))}^x= __