1 a suppose that a is a natural number and that a2 is


1. a) Suppose that a is a natural number and that a2 is divisible by 3, show that a is divisible by 3. (Hint: show that if a is not divisible by 3, then neither is a2.)

b.) Show that sqrt(3) is not rational.

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Mathematics: 1 a suppose that a is a natural number and that a2 is
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