Mathematics, 02.10.2019 11:30 shaylaahayden45061
What are the orders of 3,7,9,11,13,17 and 19(mod20)? does 20 have primitive roots?
Answers: 1
coprime to 
will be a primitive root of 
, or 
. In other words, if 
modulo 
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What are the orders of 3,7,9,11,13,17 and 19(mod20)? does 20 have primitive roots?...
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