1+1+1+1+1+1+1+····100×0＝

计算1/（1*4）+1/（4*7）+1/（7*10)+------+1/(97*100)································································································ 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? 矩阵 求逆矩阵 1+a 1 1 ·····11 1+a 1·······1· · · ···························1 1 1 1+a 急·····················1+2+3+...+999=? ·1 阅读只管向前奔跑的答案1、文章开头四句诗有什么作用························································································ 为什么0.999999······=1? 0.9999999······为什么等于1 1x2x3······x100= 1x2x3······x100= 1怎么会等于0.999999999··········? 1+2++3+··········+10000= 人到底是不是动物1·········· 自封天下第一的动物··········!1 计算下面行列式,2 1 0 0······0 01 2 1 0······0 00 1 2 1 ·····0 0············0 0 0 0······2 10 0 0 0······1 计算：3/1+8/1+15/1+·······+360/1 纸鹤数量的意义比如说 1只纸鹤,代表······· 2只纸鹤,代表······· ······················· ···························· ·················· 越多越好, 英语书 40 页 1a 人教版例如：down ·······································across···········································