极限limx→0=____.

极限limx→0=____.
【正确答案】:1/2 分析:limx→0[1/x-1/(ex-1)]=limx→0-x2/(1+x2) =limx→0(ex-1-x)′/(xex)=limx→0(ex-1)/(ex+xex-1) =limx→0(ex-1)′/(ex+xex-1)′=limx→0[ex(2ex+xex)=1/2