We provide these examples to help you get started.
Problem 1. Let be a group, such that . Find the order of .
Solution
From .
Proceeding in this manner (You should prove this with a lemma), we find that , positive integer.
Thus
But
So , and therefore, .
Problem 2. Let be a group, such that . Prove that .
Proof
We have seen that , for positive integer.
We are looking for the smallest integer, such that
Now
But
So , and therefore, .
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Order of an Element in a Group - Solved Examples
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