2/51+4/51+6/51+...50/51-1/51-3/51-...-49/512/51+4/51+6/51+...50/51-1/51-3/51-...-49/51请高手指教,

题目详情

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,

▼优质解答

答案和解析

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

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