Which one of the following relations on R is an equivalence relation?
A. aR1b ⇔ |a| = |b|
B. aR2b ⇔ a ≥ b
C. aR3b ⇔ a divides b
D. aR4b ⇔ a < b
Answer:A
Which one of the following relations on R is an equivalence relation?
A. aR1b ⇔ |a| = |b| B. aR2b ⇔ a ≥ b C. aR3b ⇔ a divides b D. aR4b ⇔ a < b