[题目]-|||-设 lim _(xarrow infty )((dfrac {x+2a)(x-a))}^x=8 且 a≠0, 求常数a的值.

已知 lim _(xarrow infty )((dfrac {x+2a)(x-a))}^x=8 ,求 a.

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

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

(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 )((1+dfrac {2)(x))}^x= __

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

8.已知 lim _(xarrow infty )dfrac ((a-1){x)^2-2x+3}({x)^2+x-5}=0 ,求a的值.

[题目]设 lim _(xarrow a)dfrac (f(x)-f(a))({(x-a))^2}=-1 则在 x=a 处 ()-|||-A.f(x)的导数存在

求lim _(xarrow infty )xsin dfrac (2)(x)求

[题目]求极限 lim _(xarrow infty )[ x-(x)^2ln (1+dfrac (1)(x))] .