6. Consider the relation R on Z defined by xRy iff x – y= 4n for some n Ɛ Z. (a) Show that R is an equivalence relation? (b) How many equivalent classes are there?

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**6. Consider the relation \( R \) on \( \mathbb{Z} \) defined by \( xRy \) if and only if \( x - y = 4n \) for some \( n \in \mathbb{Z} \).**

(a) Show that \( R \) is an equivalence relation.

(b) How many equivalent classes are there?
Transcribed Image Text:**6. Consider the relation \( R \) on \( \mathbb{Z} \) defined by \( xRy \) if and only if \( x - y = 4n \) for some \( n \in \mathbb{Z} \).** (a) Show that \( R \) is an equivalence relation. (b) How many equivalent classes are there?
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