Question

4. Use Euclid's division lemma to show that the square of any positive integer is either of
the form 3m or 3m + 1 for some integer m.
[Hint: Let x be any positive integer then it is of the form 39, 3q+1 or 3q + 2. Now square
each of these and show that they can be rewritten in the form 3m or 3m +1.]
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Answer 1

Answer:

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