Question

ДАЮ 30 БАЛЛОВ!
$lim_{x to 11 frac{ x^{2} -1}{x-1}$
1)0
2)2
3)бесконечность
4)4

Answer 1

limx->1[(x²-1)/(x-1)]=0/0;
limx->1[(x²-1)/(x-1)=limx->1[(x-1)·(x+1)/(x-1)]=limx->1(x+1)=1+1=2