Mathematics, 11.03.2020 22:49 ultimatesaiyan
4. Suppose that a positive integer is written in decimal notation as n = akak–1 … a2a1a0 where 0 ai 9. Prove that n is divisible by 11 if and only if the alternating sum of its digits a0 – ai + … + (–1) kak is divisible by 11.
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4. Suppose that a positive integer is written in decimal notation as n = akak–1 … a2a1a0 where 0 ai...
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