Question

2. The group of units of the ring Z25 is
a) {1,3,5,7,23mod 25
b) {12,3,4,6,7,7,9,11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24} mod 25
c) {1,7,8,12,16,20}mod 25
d) {1,3,6,9,12, 15, 18, 21, 24} mod 25
what's the right option and solution also ​

Answer 1

Answer:

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Step-by-step explanation:

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