cmi-entrance 2018 Q6

cmi-entrance · India · pgmath 4 marks Not Maths
Choose the correct statement(s) from below:
(A) There exists a subfield $F$ of $\mathbb{C}$ such that $F \nsubseteq \mathbb{R}$ and $F \simeq \mathbb{Q}[X]/(2X^3 - 3X^2 + 6)$;
(B) For every irreducible cubic polynomial $f(X) \in \mathbb{Q}[X]$, there exists a subfield $F$ of $\mathbb{C}$ such that $F \nsubseteq \mathbb{R}$ and $F \simeq \mathbb{Q}[X]/f(X)$;
(C) There exists a subfield $F$ of $\mathbb{R}$ such that $F \simeq \mathbb{Q}[X]/(2X^3 - 3X^2 + 6)$;
(D) For every irreducible cubic polynomial $f(X) \in \mathbb{Q}[X]$, there exists a subfield $F$ of $\mathbb{R}$ such that $F \simeq \mathbb{Q}[X]/f(X)$.
Choose the correct statement(s) from below:\\
(A) There exists a subfield $F$ of $\mathbb{C}$ such that $F \nsubseteq \mathbb{R}$ and $F \simeq \mathbb{Q}[X]/(2X^3 - 3X^2 + 6)$;\\
(B) For every irreducible cubic polynomial $f(X) \in \mathbb{Q}[X]$, there exists a subfield $F$ of $\mathbb{C}$ such that $F \nsubseteq \mathbb{R}$ and $F \simeq \mathbb{Q}[X]/f(X)$;\\
(C) There exists a subfield $F$ of $\mathbb{R}$ such that $F \simeq \mathbb{Q}[X]/(2X^3 - 3X^2 + 6)$;\\
(D) For every irreducible cubic polynomial $f(X) \in \mathbb{Q}[X]$, there exists a subfield $F$ of $\mathbb{R}$ such that $F \simeq \mathbb{Q}[X]/f(X)$.