Question

极限X平方除以1-根号1加X平方,X趋于0;麻烦写出运算过程,

Answer 1

limx*x/(1-√1+x*x)=limx*x*(1+√1+x*x)/(1-√1+x*x)(1+√1+x*x)/=limx*x*(1+√1+x*x)/[1-(1+x*x)]=-lim(1+√1+x*x) =-2