which are given in Table 3. Since Table 3 will repeat for
powers greater than 4, the proof of the above result is complete.
For other residues, it is a simple matter to form the tables and determine
how the sequences of units digits repeat. For example, taking the values of
(5) modulo 3 trivially gives 0, but modulo 4 gives the values shown in Table
4. Note that in this case the pairs of columns 1 and 2, 3 and 4, 5 and 6, are
identical except for the first element. A simple proof of this requires only the
which are given in Table 3. Since Table 3 will repeat forpowers greater than 4, the proof of the above result is complete.For other residues, it is a simple matter to form the tables and determinehow the sequences of units digits repeat. For example, taking the values of(5) modulo 3 trivially gives 0, but modulo 4 gives the values shown in Table4. Note that in this case the pairs of columns 1 and 2, 3 and 4, 5 and 6, areidentical except for the first element. A simple proof of this requires only the
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