Question

lim x^2-1/x-1 x->1. .

Answer 1

$lim_{x to 1} frac{x^2-1}{x-1}= lim_{x to 1} frac{(x-1)(x+1)}{x-1}= lim_{x to 1}(x+1)=1+1=2$

Answer 2

непонятно