2/51+4/51+6/51+...50/51-1/51-3/51-...-49/51

分类: 作业答案 • 2022-05-27 23:10:40

问题描述：

2/51+4/51+6/51+...50/51-1/51-3/51-...-49/51
2/51+4/51+6/51+...50/51-1/51-3/51-...-49/51 请高手指教,

答

2/51+4/51+6/51+...50/51-1/51-3/51-...-49/51=（2/51-1/51)+(4/51-3/51)+……+(50/51-49/51)=25*1/51=25/51