1.

Which of the following identity is true?(a) Ɛ + RR* = R* = ɛ + R*R(b) (R1R2)*R1 = R1 (R2R1)*(c) R*R* = R*(d) All of the mentioned

Answer» Right option is (d) All of the mentioned

For explanation I would say: The former Re can be produced from the latter one.


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