=
____ ．
设lim _(xarrow 0)dfrac (ln (1+x+dfrac {f(x))(x))}(x)=3，则lim _(xarrow 0)dfrac (ln
求极限lim _(xarrow infty )dfrac (1+2{e)^x}(1-3{e)^2x}-|||-__-|||-lim _(xarrow {0)^+
lim _(xarrow 0)dfrac ({(1+2{x)^2)}^dfrac (3{2)}-1}(tan 2x(cos sqrt {x)-1)}。。
15 lim_(x to +infty) ln(1+2^x) ln(1+(2)/(x))=____.15 $\lim_{x \to +\infty} \ln(1
underset(lim)(x→{0)^+}dfrac(1-{e)^dfrac(1{x)}}(x+{e)^dfrac(1{x)}}．．
计算 lim _(xarrow 0)dfrac (1)({x)^2}ln dfrac (sin x)(x) .
underset(lim)(x→0)dfrac(1-sqrt(1-{x)^2)}({e)^x-cosx}= _____．= _____．
求极限 lim _(xarrow 0)[ dfrac (1)(x)-dfrac (1)({x)^2}ln (1+x)] .
lim _(xarrow {0)^+}((ln dfrac {1)(x))}^x
15.lim_(xto+infty)ln(1+2^x)ln(1+(2)/(x))=____.15.$\lim_{x\to+\infty}ln(1+2^{x})l