Câu hỏi 157
$$
\binom{2003}{1} + \binom{2003}{4} + \binom{2003}{7} + \cdots + \binom{2003}{2002}
$$
\binom{2003}{1} + \binom{2003}{4} + \binom{2003}{7} + \cdots + \binom{2003}{2002}
$$
MathNet 2004 — Phần 02 Câu hỏi 157
Math Olympiad Vault · MathNet 2004 — Phần 02