Suppose that n>1, and the decimal expansion of 1/n has a purely repeating deciaml expansion with period n-1. Prove that n is prime. Very lost on how to do this one.
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Originally Posted by mndi1105 Suppose that n>1, and the decimal expansion of 1/n has a purely repeating deciaml expansion with period n-1. Prove that n is prime. Very lost on how to do this one. Try this.
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