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Mathematics, 11.06.2021 03:20 rosas8

Seja G um grupo e sejam H e K subgrupos de G. Mostre que H βˆͺ K e um subgrupo de G se e somente se H βŠ‚ K ou K βŠ‚ H.

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Seja G um grupo e sejam H e K subgrupos de G. Mostre que H βˆͺ K e um subgrupo de G se e somente se H...
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