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Answer» What is Quasi-inverse mean? In abstract algebra, the idea of an inverse element generalises the concepts of negation (sign reversal) (in relation to addition) and reciprocation (in relation to multiplication). The intuition is of an element that can 'undo' the effect of combination with another given element. While the precise definition of an inverse element varies depending on the algebraic structure involved, these definitions coincide in a group. The word 'inverse' is derived from Latin: inversus that means 'turned upside down', 'overturned'. reference
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