Question

lim (x^4 -1)/x
x->0

Answer 1

because it :0/0 use l'Hôpital's rule(take derivative of numerator & denominator):

Answer 2

lim (4x^3)/1=0 (when x->0)

Answer 3

\[\lim_{x\rightarrow 0}\frac{x^4-1}{x}\] does not exist