1/20+1/30+1/42······+1/132 简算 帮帮忙!
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1/20+1/30+1/42······+1/132 简算 帮帮忙!
计算1/(1*4)+1/(4*7)+1/(7*10)+------+1/(97*100)································································································
8+11+14+17+20+·······+305 数学计算题.呜呜呜1+2+3+4+···················+98+99+100+99+98+···············+3+2+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························································································
1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········?
急·····················1+2+3+...+999=?
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,
矩阵 求逆矩阵 1+a 1 1 ·····11 1+a 1·······1· · · ···························1 1 1 1+a
英语书 40 页 1a 人教版例如:down ·······································across···········································
观察1/2 1/6 1/12 1/20 1/30·····的排列顺序,第60个数是多少?观察1/2 1/6 1/12 1/20 1/30··························的排列顺序,第60个数是多少?
在等腰三角形ABC中,AB=AC.求证1、∠BAD=∠CAE 2、如果AD=AE,那么BD=CE吗?急啊·························································
“亲热、和善、拘束、惊恐”的近义词和反义词!速度····················1!·······111111111~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.
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
1+2+3+4+5+6+7+8+9+1+11+12+13+14+15````````1+2+3+4+5+6+7+8+9+1+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28++29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50··································
为什么0.999999······=1?