Question 1 Consider the groups Z² = Z× Z and Z³ = ZxZxZ and the map ƒ : Z³ → Z² defined by the rule f((a,b,c)) = (a+b+c,a+b). 1. Show that f is a group homomorphism.

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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I know that the definition of an homomorphism is that f(axb) = f(a) x f(b) but how do I do it with a third element, c? Please explain this exercise, thank you very much!! :)

Question 1 Consider the groups Z² = Z × Z and Z³ = Z × Z × Z and the map ƒ : Z³ → Z²
defined by the rule
f((a,b,c)) = (a+b+c, a+b).
1. Show that f is a group homomorphism.
Transcribed Image Text:Question 1 Consider the groups Z² = Z × Z and Z³ = Z × Z × Z and the map ƒ : Z³ → Z² defined by the rule f((a,b,c)) = (a+b+c, a+b). 1. Show that f is a group homomorphism.
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