| |x2−1| | x2−1 | |||
Hej czy funkcja f(x) = | to te samo co f(x) =| | | ? | ||
| x3−x | x3−x |
| |x2−1| | |x2−1| | |||
f(x)= | = | = | ||
| x3−x | x(x2−1) |
| x2−1 | 1 | |||
{ | = | , gdy x2−1>0 ⇔ x<−1 v x>1, | ||
| x(x2−1) | x |
| 1 | ||
{ = − | , gdy −1< x< 1 . ...  | |
| x |