摘要: \(\text {T1}\):\(x^2+xy+y^2=4\) 有多少对整数解? \(\text {T2}\):求 \(\displaystyle\sum_{k=1}^{2025}\dfrac{1}{2^k}\sin\left(\dfrac{2k\pi}3\right)\). \(\text {T3 阅读全文
posted @ 2025-07-25 19:47 envyisthecolor 阅读(8) 评论(0) 推荐(0)