1/(5*8)+1/(8*11)+.+1(98*101)
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1/(5*8)+1/(8*11)+.+1(98*101)
![1/(5*8)+1/(8*11)+.+1(98*101)](/uploads/image/z/342418-58-8.jpg?t=1%2F%EF%BC%885%2A8%EF%BC%89%2B1%2F%EF%BC%888%2A11%EF%BC%89%2B.%2B1%EF%BC%8898%2A101%EF%BC%89)
1/(5*8)+1/(8*11)+1/(11*14)+L+1/(98*101)
=(1/5-1/8+1/8-1/11+1/11-1/14+.+1/98-1/101)*1/3
=(1/5-1/101)*1/3
=32/505
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(1/2)*(1/3)=1/6
(1/2)*(1/3)=(1/2)-(1/3)=3/6-2/6=1/6
而(1/5)*(1/8)=1/40
(1/5)*(1/8)=(1/5)-(1/8)=8/40-5/40=3/40
两式不一样?
再答: (1/5)*(1/8)=1/40
(1/5)*(1/8)=(1/5)-(1/8)=8/40-5/40=3/40
我的解答后面还乘了个1/3
(1/5)*(1/8)=[(1/5)-(1/8)]*1/3=3/40*1/3=1/40
=(1/5-1/8+1/8-1/11+1/11-1/14+.+1/98-1/101)*1/3
=(1/5-1/101)*1/3
=32/505
土豆团邵文潮为您答疑解难.
如果本题有什么不明白可以追问,
再问: 你好!
(1/2)*(1/3)=1/6
(1/2)*(1/3)=(1/2)-(1/3)=3/6-2/6=1/6
而(1/5)*(1/8)=1/40
(1/5)*(1/8)=(1/5)-(1/8)=8/40-5/40=3/40
两式不一样?
再答: (1/5)*(1/8)=1/40
(1/5)*(1/8)=(1/5)-(1/8)=8/40-5/40=3/40
我的解答后面还乘了个1/3
(1/5)*(1/8)=[(1/5)-(1/8)]*1/3=3/40*1/3=1/40
1/(5*8)+1/(8*11)+.+1(98*101)
1/(5*8)+1/(8*11)+1/(11*14)+L+1/(98*101)答案,以及L的含义
1.(2*5)分之1 + (5*8)分之1 + (8*11)分之1 +……(98*101)分之1=?
1/3*5+1/5*8+1/8*11+.+1/98*101
5*8/1加8*11/1加11*14/1.加98*101/1 求巧算
简算1/(5*8)+1/(8*11)+1/(11*14)+.+1/(95*98)+1/(98*101)=
简算:1\5*8+1\8*11+1\11*14+……+1\95*98+1\98*101
1/5*8+1/8*11+……+1/98*101 简便方法
计算(1+3+5+7+省略号+99+101)-(2+4+6+8+省略号+98+100)的结果是( )
计算题 (1+3+5+7+……+99+101)-(2+4+6+8+……+98+100)
(1+3+5+7+9……+99+101)-(2+4+6+8+10+……+98+100)
(1+3+5+7+9……+99+101)-(2+4+6+8……+98+100)=?