Question

помогите с пределами, прошу(((((((

Answer 1

$lim_{x to 1} frac{ x^{2} -1}{ x^{2} +6x-7} = lim_{x to 1} frac{ (x -1)(x+1)}{(x+7)(x-1)}$$= lim_{x to 1} frac{ (x+1)}{(x+7)} = frac{1+1}{1+7} = frac{1}{4}$

Answer 2

спасибо большоое)

Answer 3

=lim [(x-1)*(x+1)]/[(x-1)*(x+7)]=lim (x+1)/(x+7)=2/8=1/4