Câu hỏi 109
Tính
$$
\frac{2+3+\cdots+100}{1}+\frac{3+4+\cdots+100}{1+2}+\cdots+\frac{100}{1+2+\cdots+99} .
$$
$$
\frac{2+3+\cdots+100}{1}+\frac{3+4+\cdots+100}{1+2}+\cdots+\frac{100}{1+2+\cdots+99} .
$$
MathNet 2024-part-06 — 165 bài (EN–VI) Câu hỏi 109
Math Olympiad Vault · MathNet 2024-part-06 — 165 bài (EN–VI)