Question: 6. In each case, determine whether or not # is a subgroup of G. a) G = (Z +): H =Z+. bj G = (Q

6. In each case, determine whether or not # is a subgroup of G. a) G = (Z +): H =Z+. bj G = (Q -10), -): H =Q+. c) G = (Z. @); H = (0, 2,4)- d) G = set of ordered pairs of real numbers (a, 5) under vector addition; H = set of ordered pairs of real numbers (a, b) such that b = -a

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