| In order for the limit to be 0, both the left and right limits must equal 0. But in fact neither of them equals 0: |
| lim x  0 | f(x) = -1  0. |
| lim x 0 | f(x) = 3
0. |
| In order for the limit to be 0, both the left and right limits must equal 0. But in fact neither of them equals 0: |
| lim x 0 | f(x) = -1 0. |
| lim x 0 | f(x) = 3
0. |