Question 1. Use set builder notation to describe each of the following sets. (a) All positive integer powers of 4. (b) All positive multiples of 7 and all positive multiples of 8. (c) All positive multiples of 7 and 8 (i.e. the numbers have to be multiples of both 7 and 8). (d) All pairs of integers that sum to 100. (e) All real numbers whose square is less than 100.

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