若lim_(xto3)(f(x)-2sqrt(x+1))/(x^2)-9=-(1)/(16),则f(x)=（）.

(1)lim_(xto3)(sqrt(x^3)+9-6)/(2-sqrt(x^3)-23)=_____.(1)$\lim_{x\to3}\frac{\sqrt{

5.单选题 若lim_(xto a)f(x)=2，lim_(xto a)g(x)=3，则lim_(xto a)[f(x)+g(x)]的值是（）A. 5B. 6C

1 设lim_(xto0)(1+x+(f(x))/(x))^(1)/(x)=e^3,则lim_(xto0)(1+(f(x))/(x))^(1)/(x)=____

11.已知lim_(x to 0) (ln(1+frac(f(x))/(x)))(2^x-1)=3，则lim_(x to 0) (f(x))/(sqrt(1+x

设函数f(x)=x^2+3x-2，求lim_(xto1)f(x)的值。A. 2B. 4C. 6D. 8

若 lim_(x to 0) (f(2x))/(x) = 2，则 lim_(x to infty) xf((1)/(2x)) = ( )A. $\frac{1}

设函数f(x)在x=2处连续，且lim_(xto2)(f(x)-1)/(x-2)存在，则f(2)=____.18. (4.0分) 设函数f(x)在x=2处连续，

1.-|||-若limf(x)存在,且 (x)=(x)^3+dfrac (2{x)^2+1}(x+1)+2lim _(xarrow 1)f(x) ,则 lim

若 (x+1)=2x+3, 则 f(f(x)-3)= __

1、如果lim_(xto x_0)f(x)=infty，lim_(xto x_0)g(x)=infty，则必有A. $\lim_{x\to x_0}[f(x)+