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9.Let S be the set of all real numbers and let R ={(a, b) :a, b belongs to S and a=+-b}. Show that R is an equivalence relation on S. |
| Answer» 9.Let S be the set of all real numbers and let R ={(a, b) :a, b belongs to S and a=+-b}. Show that R is an equivalence relation on S. | |