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Topic | Why is x^5 - x always divisible by 10 for any positive integer x? |
konokonohamaru 10/23/19 12:09:06 PM #23: | My intuition was to brute force the proof by using the multinomial expansion and looking at the coefficients. Looked up the necklace proof... very clever! --- A very happy young man looking forward to a bright and wonderful future. ... Copied to Clipboard! |
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