Question

group U(15)the order of 7 is​

Answer 1

Answer:

For example, For U(15) = {1,2,4,7,8,11,13,14} under multiplication modulo 15. This group has order 8. To find the order of the element 7, say, we compute the sequence 7^1= 7, 7^2= 4, 7^3= 13, 7^4= 1, so |7|=4

Answer 2

Answer:

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