First answer (by Anders) on http://www.quora.com/Mathematics/How-would-I-show-that-49-divides-8-n-7n-1-for-all-n-ge-0
Can anyone explain it to me? Hints'd be appreciated.

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@mukushla @KingGeorge @Zarkon

can u type the equation here plz :)

@mukushla try again.

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