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# Let K be a field extension of F and let a K. Show that

## Problem 13E Chapter 21

Contemporary Abstract Algebra | 8th Edition

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Contemporary Abstract Algebra | 8th Edition

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Problem 13E

Let K be a field extension of F and let a ?K. Show that [F(a):F(a3)] ? 3. Find examples to illustrate that [F(a):F(a3)] can be 1, 2, or 3.

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Let K be a field extension of F and let a K. Show that

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