lim_(x→1)（(2)/(({x^2)-1)}-(1)/(x-1)）=（ ）

lim_(x arrow 1) (sin^2(x-1))/(x^2)-1$\lim_{x \rightarrow 1} \frac{\sin^{2}(x-1)}

lim_(x to 0) (2^x-1)/(x)= ( )A. ln2B. 2C. 1D. 0

求极限 lim_(x to infty) ( (2x+3)/(2x+1) )^x-1 求极限 $\lim_{x \to \infty} \left( \frac

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

A.lim _(xarrow 1)dfrac ({x)^2+x-2}({x)^2-1}=lim _(xarrow 1)dfrac ((x-1)(x+2))((x

3.计算下列极限(1) lim_(x→2)(-2) ;(2) lim_(x→1)(x^3-x^2+x-1) ;21(3)lim_(x→2)(x^2-16)/(x

3.计算下列极限(1) lim_(x→2)(-2) ;(2) lim_(x→1)(x^3-x^2+x-1) ;21(3)lim_(x→2)(x^2-16)/(x

②lim_(xto+infty)(1+x)^(1)/(x).③lim_(xtoinfty)(1+(1)/(sqrt(1+x^2)))^x. ④lim_(xto

lim_(x to 0) ( (1)/(x^2) - (1)/(x arcsin x) ) $\lim_{x \to 0} \left( \frac{1}{x^

4、极限lim_(xto1)(x+x^2+...+x^n-n)/(x-1)=( ).A. 0B. ∞C. nD. $\frac{n(n+1)}{2}$