Combinations: Difference between revisions
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[[Category:Local variations]] | [[Category:Local variations]] | ||
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Is it \(_nC_r\) or \(^nC_r\)?<ref>[https://twitter.com/christianp/status/335024096947617793 Tweet by Christian Lawson-Perfect]</ref> | Is it \(_nC_r\) or \(^nC_r\)?<ref>[https://twitter.com/christianp/status/335024096947617793 Tweet by Christian Lawson-Perfect]</ref> | ||
Revision as of 14:21, 10 July 2021
Is it \(_nC_r\) or \(^nC_r\)?[1]