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Question

A monoid is called a group if _______

a.

(a*a)=a=(a+c)

b.

(a*c)=(a+c)

c.

(a+c)=a

d.

(a*c)=(c*a)=e

Posted under Discrete Mathematics

Answer: (d).(a*c)=(c*a)=e

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Q. A monoid is called a group if _______

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