V_{n}^{k} = n \cdot (n - 1) \cdot \dots \cdot (n - k + 1) = \frac{n!}{(n - k)!}

${V^k_n = n \cdot (n - 1) \cdot \ldots \cdot (n - k + 1) = \frac {n!} {(n - k)!}}$

Error