1/(12×13)+1/(13×14)+……+1/(19×20)的值为:

资格题库2022-08-02  16

问题 1/(12×13)+1/(13×14)+……+1/(19×20)的值为:A1/12B1/20C1/30D1/40

选项

答案 C

解析
转载请注明原文地址:https://tihaiku.com/gongwuyuan/1274071.html

最新回复(0)