| lim x  0 | f(x) =  1, and |
| lim x 0 | f(x) = 3. |
From the above two questions, we know that
| lim x 0 | f(x) = 1, and |
| lim x 0 | f(x) = 3. |
By the definition box above the questions, we now see that, since the left and right limits do not agree,
| lim x 0 | f(x) does not exist. |
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