# Concept derivation guides

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

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Concept guide



## [Ratio limits, geometric domination and L=1](/en/derivations/derivation-mko-ratio-test-series-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-ratio-test-series)

Use complete rational ratios for L<1 convergence and L>1 divergence, then audit indecision at L=1.

Ratio test for series

derivation-mko-ratio-test-series-01





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