Exercise 8.12. Let : Z Z ⇒ Z via (a, b) → a + b. (1) Prove that is a homomorphism. (2) Find kero. (3) Find 6−¹(2), 6−¹(5), and 6-¹(10).

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Exercise 8.12. Let : Z Z ⇒ Z via (a, b) → a + b.
(1) Prove that is a homomorphism.
(2) Find kero.
(3) Find 6−¹(2), 6−¹(5), and 6-¹(10).
Transcribed Image Text:Exercise 8.12. Let : Z Z ⇒ Z via (a, b) → a + b. (1) Prove that is a homomorphism. (2) Find kero. (3) Find 6−¹(2), 6−¹(5), and 6-¹(10).
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