(1+7\33)+(1+7\33×2)+``````+(1+7\33×11)=?

sadlkgjawlkrgeth2022-10-04 11:39:541条回答

已提交,审核后显示!提交回复

共1条回复
民用_菜刀 共回答了22个问题 | 采纳率90.9%
(1+733)+(1+733×2)+``````+(1+733×11)
=11+7/33×(1+2+……+11)
=11+7/33×(1+11)×11/2
=11+7/33×66
=11+14
=25
1年前

相关推荐