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<oerjan> learn An intersection is the opposite of an inverbosection.
author HackBot
date Thu, 13 Oct 2016 00:27:10 +0000
parents d3c294a55f99
children
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|a+b@| = { √(a²-b²) if a²-b² ≥ 0 ; i√(a²-b²) if a²-b² < 0 }