let G be an abelian group, and n positive integer(adsbygoogle = window.adsbygoogle || []).push({});

phi is a map frm G to G sending x->x^n

phi is a homomorphism

show that

a.)ker phi={g from G, |g| divides n}

b.) phi is an isomorphism if n is relatively primes to |G|

i have no clue how to even start the prob...:-(

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# Homework Help: Abelian group isomorphism help

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