Recall that a is an idempotent if a2 = a. Show that if 1 +
Chapter 18, Problem 15SE(choose chapter or problem)
Problem 15SE
Recall that a is an idempotent if a2 = a. Show that if 1 + k is an idempotent in Zn, then n ≠k is an idempotent in Zn.
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