Изменения

<tex dpi = "140">|B| = \frac{|C|}{2} + \frac{1}{2n}(\frac{n}{2}k^{\frac{n}{2}} + \frac{n}{2}k^{\frac{n}{2} + 1}) </tex> <tex dpi = "140">= \frac{|C|}{2} + \frac{1}{4}k^{\frac{n}{2}}(k + 1) = \frac{1} {2n}\sum_{q|n}\phi(n/q)k^q + \frac{1}{4}k^{\frac{n}{2}}(k+1)</tex>