Equivalence relations-equivalence classes

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Reference no: EM13121706

I don't know how to show the following are equivalence relations and if they are, how to describe equivalence classes.

1. a^2 + b^2=c^2 + d^2 where a,b,c,d are real numbers(describe equivalence cl)

2. For a pair of fractions a/b and c/d define a/b ~ c/d if ab=cd(same here)

Reference no: EM13121706

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