math_proof
prove 7 divides 2n1 = 3divides n



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Prove tht \[\forall n \in \mathbb{N} , 7(2^n1) <=> 3n\]

math_proof
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a hint is to look at the multiplication table (for \[\mathbb{Z}/7\mathbb{Z}\] and computer
powers of 2 mod 7, and to notice how they repeat

kajolc.2496
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dw:1352059720286:dw

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thats not a proof

kajolc.2496
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oh yaa u are right!

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1. it is not a proof 2. 3 divides n means n/3 not 3/n :p

kajolc.2496
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sorry :P