Question 172
Express
$$
\sum_{k=0}^{n} (-1)^k (n-k)!(n+k)!
$$
in closed form.
$$
\sum_{k=0}^{n} (-1)^k (n-k)!(n+k)!
$$
in closed form.
MathNet 2001 — Part 01 Question 172
Math Olympiad Vault · MathNet 2001 — Part 01
Math Olympiad Vault · MathNet 2001 — Part 01