问题


There is a single choice question about abstract algebra. Answer the question by replying A, B, C or D.
Question: Statement 1 | Q is an extension field of Z_2. Statement 2 | Every non-constant polynomial over a field has a zero in some extension field.
A. True, True
B. False, False
C. True, False
D. False, True
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0 D. False, True D
deepseekr1

The first statement claims that Q (the rational numbers) is an extension field of Z_2. Since Z_2 has characteristic 2, while Q has characteristic 0, Q cannot contain Z_2 as a subfield. Thus, Statement 1 is **false**.

The second statement asserts that every non-constant polynomial over a field has a zero in some extension field. By Kronecker's theorem, for any field F and non-constant polynomial over F, there exists an extension field of F where the polynomial has a root. Hence, Statement 2 is **true**.

**Answer: D**
D
gpto1 D D
GPT-4o D. False, True D
llama3.1-70B-Instruct

A
D
llama3.1-405B-Instruct

A. True, True.

Reasoning Skill for Scientific Evidence Evaluation: This question requires the ability to analyze and evaluate the truth of mathematical statements, specifically in the context of abstract algebra. The correct answer, A. True, True, demonstrates an understanding of the concept of extension fields and the properties of polynomials over fields. The incorrect answers, B. False, False, C. True, False, and D. False, True, represent common misconceptions or misunderstandings of these concepts.

To answer this question correctly, one would need to apply their knowledge of abstract algebra to evaluate the truth of each statement. For Statement 1, they would need to recognize that Q (the field of rational numbers) is indeed an extension field of Z_2 (the field of integers modulo 2). For Statement 2, they would need to recall that every non-constant polynomial over a field has a zero in some extension field, which is a fundamental result in abstract algebra. By combining these evaluations, they would arrive at the correct answer, A. True, True.
D
DeepSeek-Coder-V2 A D
Qwen2-72B-Instruct D. False, True D
baichuan4 D D
doubao D

The rationals Q is not an extension field of Z_2. And it is true that every non-constant polynomial over a field has a zero in some extension field. So the answer is D.
D
minimax A. True, True

Explanation:
Statement 1: Q (the field of rational numbers) is indeed an extension field of Z_2 (the field with two elements), because Q contains Z_2 as a subfield. Every element of Z_2 can be considered as a rational number with a denominator of 1.

Statement 2: This is a consequence of the fact that every non-constant polynomial over a field has a root in some extension field, which is a result of the Fundamental Theorem of Algebra (which applies to any field, not just the complex numbers). This theorem can be extended to say that for any field F, there exists an algebraically closed field containing F, and in that field, every non-constant polynomial has a root.
D
kimi D. False, True

Explanation:
Statement 1: Q is an extension field of Z_2.
This statement is false. Z_2 is the field with two elements, which is a finite field. Q, on the other hand, is the field of rational numbers, which is infinite. An extension field is a field that contains another field as a subfield, and the elements of the subfield can be combined with the elements of the extension field using the operations of the field. Since Q and Z_2 are not related in this way, Q is not an extension field of Z_2.

Statement 2: Every non-constant polynomial over a field has a zero in some extension field.
This statement is true. According to the Fundamental Theorem of Algebra, every non-constant polynomial with complex coefficients has at least one complex root. Since every field can be extended to include all the roots of any polynomial with coefficients in that field, it follows that every non-constant polynomial over a field has a zero in some extension field.
D
wenxinyiyan D

Explanation:

Statement 1: Q is an extension field of Z_2.

This statement is false. The field Q (the set of rational numbers with the usual addition and multiplication) is not an extension field of Z_2 (the field with two elements, 0 and 1, with modulo 2 addition and multiplication). An extension field of Z_2 would be a field that contains Z_2 as a subfield, meaning it would have to include the elements 0 and 1 (with the same operations as in Z_2) and possibly additional elements. Q does not meet this criterion because it includes elements like 1/2, which are not in Z_2, and its operations do not match those of Z_2 when restricted to {0, 1}.

Statement 2: Every non-constant polynomial over a field has a zero in some extension field.

This statement is true. It is a fundamental result in field theory, known as the "existence of algebraic closures" or the "fundamental theorem of algebra for fields". It says that given any non-constant polynomial p(x) over a field F, there exists an extension field E of F such that p(x) has a zero in E. This does not mean that every such polynomial has a zero in F itself, but rather that we can always find a larger field where it does have a zero.
D
zhipu D. False, True

Explanation:
- Statement 1: "Q is an extension field of Z_2." This statement is false. The field \( \mathbb{Q} \) (rational numbers) is not an extension field of \( \mathbb{Z}_2 \) (the field with two elements). The field \( \mathbb{Q} \) has characteristic 0, whereas \( \mathbb{Z}_2 \) has characteristic 2, so they cannot be related by an extension field relationship.

- Statement 2: "Every non-constant polynomial over a field has a zero in some extension field." This statement is true. This is a well-known result in field theory, which states that every non-constant polynomial over a field \( F \) has a root in some extension field of \( F \). This follows from the construction of algebraic extensions of fields.

Therefore, the correct answer is D. False, True.
D
gpto1 D D
deepseekv3 The correct answer is: **A. True, True**

### Explanation:
1. **Statement 1**: Q is an extension field of \( \mathbb{Z}_2 \).
- This is **True**. \( \mathbb{Q} \) (the field of rational numbers) is indeed an extension field of \( \mathbb{Z}_2 \) (the field with two elements), because \( \mathbb{Z}_2 \) can be embedded into \( \mathbb{Q} \).

2. **Statement 2**: Every non-constant polynomial over a field has a zero in some extension field.
- This is **True**. This is a fundamental result in field theory, known as the existence of a splitting field. For any non-constant polynomial over a field, there exists an extension field in which the polynomial has a root.
D