They seem to forget to first condition on the fact that the threshold must be an integer. This narrows the possibility space to have size countable infinit rather than uncountable infinit. Meaning they need to do a completely different mahtematics, which gives the correct ressult
They seem to forget to first condition on the fact that the threshold must be an integer. This narrows the possibility space to have size countable infinit rather than uncountable infinit. Meaning they need to do a completely different mahtematics, which gives the correct ressult