Consider all positive integers with seven different digits. (Note that zero cannot be the first digit, and by different, we mean that there is no repeated digit

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Q: prove the following statement.

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Q: Suppose “a” is an integer. If 5|2a, then 5|a.

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Q: 3. Which of the following operations is BOTH associative and commutative on C. a*b = 2- positive…

A: Solution