Question

chapter limits and continuity

Answer 1

Hope you understand my writing and it helps

Answer 2

$we \: know \: ..x^{3} - {1}^{3} = (x - 1)(x ^{2} + x + 1)$
Lim x->1 [(x³-1)/(x-1)]
= lim x->1 [ (x-1)(x²+x+1)/(x-1)]
= lim x->1 (x² + x +1)
= 1 + 1 + 1 =3.. Ans