Question
Mathematics Question on Set Theory & Algebra
Which of the following is false ?
A
(N, +) is a semi-group
B
(Z, +) is a group
C
(N,.) is a group
D
Set of all cube roots of unity is an abelian finite group under multiplication
Answer
(N,.) is a group
Explanation
Solution
The correct option is (C) : (N,.) is a group.