/ 4 2\ |1 + x + x - x | lim |---------------| x->-1+| 4 | \ -1 + x /
Limit((1 + x + x^4 - x^2)/(-1 + x^4), x, -1)
/ 4 2\ |1 + x + x - x | lim |---------------| x->-1+| 4 | \ -1 + x /
1/4
= 0.25
/ 4 2\ |1 + x + x - x | lim |---------------| x->-1-| 4 | \ -1 + x /
1/4
= 0.25
= 0.25