Mathematics · Field Theory
Consider the polynomial f(x) = x2025 - 1 over the finite field 𝔽5 with five elements. Let S be the set of all roots of f in an algebraic closure of 𝔽5. Which of the following statements is true?
- 1S has 81 distinct elements✓
- 2S is an infinite set
- 3S has 2025 distinct elements
- 4S forms a non-abelian group under multiplication
Correct answer
S has 81 distinct elements
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