Let $n$ be arbitrary positive integer. Does $\Bbb Q_p^×$ have index $n$ subgroup?
If I could prove this, from local class field theory, I can say $\Bbb Q_p$ has arbitrary degree of extension.
I know $\Bbb Q_p^×$ is isomorphic to $\Bbb Z×\Bbb Z_p×\Bbb Z/(p-1)\Bbb Z$ using formal logarithm.
Reference is also appreciated.
Thank you in advance.