An algebraic structure _________ is called a semigroup.
A. (P, *)
B. (Q, +, *)
C. (P, +)
D. (+, *)
Answer:A
An algebraic structure _________ is called a semigroup.
A. (P, *) B. (Q, +, *) C. (P, +) D. (+, *)
Explanation: An algebraic structure (P,*) is called a semigroup if a*(b*c) = (a*b)*c for all a,b,c belongs to S or the elements follow associative property under “*”. (Matrix,*) and (Set of integers,+) are examples of semigroup.