Enter the integer which is the apparent limit of the following sequences or enter N if the sequence does not appear to have a limit.
1. the sequence generated by [math] where [math] is any sequence of numbers approaching zero and [math]\
2. [math]
3. the sequence generated by [math] where [math] is a sequence of negative numbers approaching zero and [math]\
4. the sequence generated by [math] where [math] is a sequence of positive numbers approaching zero and [math]

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