# Concept derivation guides

299 concept teaching guides, separate from the 36,000 individual question derivations.

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Concept guide



## [Extracting 3-adic factors of signed integers](/en/derivations/derivation-mko-p-adic-valuation-integers-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-p-adic-valuation-integers)

v3(-108)=3,v3(18)=2,v3(-1944)=5,v3(-90)=2; zero uses infinity.

p-adic valuation of integers

derivation-mko-p-adic-valuation-integers-01





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