Possible Duplicate:
Splitting field of $x^{n}-1$ over $\mathbb{Q}$
Let $A$ denote the splitting field of $x^n-1$ over $\mathbb{Q}$, so what is the dimension of $A$ as a linear space over $\mathbb{Q}$? (in this question, $n$ is a positive integer)
Possible Duplicate:
Splitting field of $x^{n}-1$ over $\mathbb{Q}$
Let $A$ denote the splitting field of $x^n-1$ over $\mathbb{Q}$, so what is the dimension of $A$ as a linear space over $\mathbb{Q}$? (in this question, $n$ is a positive integer)