极限underset(lim)(x→+∞)（sinsqrt(x+1)-sinsqrt(x)）= ____ ．

求极限underset(lim)(x→0)cotx（(1)/(sinx)-(1)/(x)）求极限$\underset{lim}{x→0}$cotx（$\frac

极限 lim _(xarrow infty )((dfrac {x+1)(x-1))}^x= () .

极限 lim _(xarrow infty )((dfrac {x+1)(x-1))}^x= __

10.函数f(x)=sinsqrt(x)+(1)/(ln(1-x))定义域为（）A. [0,1]B. [0,1)C. (0,1]D. (0,1)

求极限 lim (sin sqrt (x+1)-sin sqrt (x)).

underset(lim)(x→0)（(1)/(x)-(1)/((e)^x-1)）$\underset{lim}{x→0}$（$\frac{1}{x}$-$\f

求下列极限.-|||-lim _(xarrow 0)dfrac ({e)^x-sqrt (x+1)}(x);

求极限lim _(xarrow 0)dfrac (x({e)^x+1)-2((e)^x-1)}({x)^3}-|||-__求极限

求极限underset(lim)(x→0)（((a)^x+(b)^x+(c)^x)/(3)）{}^(1)/(x)（a＞0，b＞0，c＞0）求极限$\unders

已知极限 lim _(x arrow infty)((x^2)/(x+1)-x-a)=2，则常数 a 是（ ）A. 1B. 2C. -2D. -3