Question: Let X be a set. Recall that a binary relation on X is a subset Y CXXX. (a) Write down the conditions for Y

Let X be a set. Recall that a binary relation on X is a subset Y CXXX. (a) Write down the conditions for Y to be an equivalence relation. (b) Let Y RXR be the image of the map ZxR-RxRdefined by (n,r) (r, nr). Explain why Y is or is not an equivalence relation.

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