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Mathematics 12 Online
OpenStudy (anonymous):

Determine which, if either, of the following sets form a group with respect to the given operation. I. {1,2,3,4,5}; multiplication modulo 7 II. the sets of integers with respect to multiplication a. only II form a group b. only I forms a group c. neither forms a group d. both form groups

OpenStudy (amistre64):

what does it take to be a group?

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