Question

C04
Consider the set N of positive integers, and let * denote least common multiple (LCM) operation
on N, then (NH)
A is a semigroup
B. is a commutative group
C. has 2 as the identity element
D. none of the above​

Answer 1

Answer:

Option (c) has 2 as the identity element

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Option c is only considering the answer

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