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The set of complex number z with | z | = 1 under the operation * denote  by  z1 * z2 = | z1 | ·z2
  • a)
    group but not abelian
  • b)
    group but not cyclic
  • c)
    cyclic group
  • d)
    None of the above
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The set of complex number z with| z| = 1 under theoperation *denotebyz...
The operation * on the set of complex numbers z with |z| = 1 is defined as follows:

For any two complex numbers z1 and z2 with |z1| = |z2| = 1, their operation * is given by:

z1 * z2 = |z1|

In other words, when two complex numbers z1 and z2 with magnitude 1 are multiplied under this operation *, the result is the magnitude of z1.

Note that the operation * does not depend on the actual values of z1 and z2, only on their magnitudes being 1.
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