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

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

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

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

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

[题目]求 lim _(xarrow infty )((sin dfrac {2)(x)+cos dfrac (1)(x))}^x

[题目] 求极限: lim _(xarrow -infty )dfrac (sqrt {4{x)^2+x-1}+x+1}(sqrt {{x)^2+sin x}}

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

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

6、极限 lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2+1})= () 。(较难)-|||-A、0 B、 d

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