I'm studying N2 grammar and I was surprised by the meaning of ばかりか and のみか when I first came across them. E.g:
I can see these か forms are the same as ばかりでなく and のみならず (and だけでなく) so the か is clearly a negative marker in this context. When I first read the example sentences, I didn't immediately 'get' that the ばかりか bit was negative until I read the explanation.
What I'm wondering is are there other times when か is used as a negative in this way? Is this like a special negative form, or are these examples basically exceptions? Or is this more like the か in かどうか or something like that?