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Determine whether the relation R on the set of all real numbers is reflexive, symmetric or transitive? where (x,y) is an element of R Explain why and why not by proving and giving examples.

(a) x=1
(b) xy ≥ 0
(c) x-y is a rational number
(d)x+y = 0


I need help urgently!!!! pls reply asap!!! thanks so much!!

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