9. Let E be àń extension field of F, and let a, ß e E. Suppose a is transcendental over F but algebraic over F (P). Show that B is algebraic over F(@).

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Section 29 number 30
29. Let E be an extension field of F, and let a, BE E. Suppose a is transcendental over F but algebraic over F(ß).
Show that B is algebraic over F (a).
30. Let E be an extension field of a finite field F, where F has q elements. Let a e E be algebraic over F of degree
n. Prove that F (@) has q" elements.
31 a Show that there exists an irreducible polynomial of degree 3 in Z3[x].
Transcribed Image Text:29. Let E be an extension field of F, and let a, BE E. Suppose a is transcendental over F but algebraic over F(ß). Show that B is algebraic over F (a). 30. Let E be an extension field of a finite field F, where F has q elements. Let a e E be algebraic over F of degree n. Prove that F (@) has q" elements. 31 a Show that there exists an irreducible polynomial of degree 3 in Z3[x].
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