15 lim_(x to +infty) ln(1+2^x) ln(1+(2)/(x))=____.15 $\lim_{x \to +\infty} \ln(1
58 求极限：lim_(xto+infty)(x^(1)/(x)-1)^(1)/(ln x).58 (10-3 10分)求极限：$\lim_{x\to+\inf
注 类似地，求极限lim_(xto0)(ln(1+x)ln(1-x)-ln(1-x^2))/(x^4).2.“(infty)/(infty)”型极限注 类似地，
(2) lim _(xarrow 0)[ dfrac (1)(ln (1+{tan )^2x)}-dfrac (1)(ln (1+{x)^2)}]
(2) lim _(xarrow 0)[ dfrac (1)(ln (1+{tan )^2x)}-dfrac (1)(ln (1+{x)^2)}]
lim _(xarrow +infty )times 2[ ln (x2+1)-2ln x] = () .
②lim_(xto+infty)(1+x)^(1)/(x).③lim_(xtoinfty)(1+(1)/(sqrt(1+x^2)))^x. ④lim_(xto
求极限lim_(xto+infty)x(sqrt(1+x^2)-x).2. 求极限$\lim_{x\to+\infty}x(\sqrt{1+x^{2}}-x).
160 求极限lim _(xarrow infty )(x)^2[ ln ((x)^2+1)-2ln x] = x]=160求极限
求极限 lim _(xarrow 0)dfrac (ln (1+{x)^2)-ln (1+(sin )^2x)}(x{sin )^3x}