16.
closed
8. Which of the given sets of whole numbers
under addition? If the set is no...
Mathematics, 28.09.2020 07:01 layla07
16.
closed
8. Which of the given sets of whole numbers
under addition? If the set is not closed, give an
example of two elements from the set whose sum is not
in the set.
(a) {10, 15, 20, 25, 30, 35, 40, ...}
(b) {1,2,3, . . . , 1000}
(c) {0}
(d) {1,5,6, 11, 17,28, ...}
(e) {n EN n 2 19)
(f) {0,3, 6, 9, 12, 15, 18, ...}
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