1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=
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1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=1/2+1/4+1/8+1/31+1/6
1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=
1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=
1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=
原式=1/2+1/4+1/8+1/31+1/(31*2)+1/(31*4)+1/(31*8)+1/496
=1/2*(1+1/31)+1/4*(1+1/31)+1/8*(1+1/31)+1/31+1/496
=1/2*(32/31)+1/4*(32/31)+1/8*(32/31)+1/31+1/496
=16/31+8/31+4/31+1/31+1/496
=(16+8+4+1)/31+1/496
=29/31+1/496
=29*16/31*16+1/31*16
=(29*16+1)/496
=(30*16-15)/496
=465/496
1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=15/16
15/16
先算1/31+1/62+1/124+1/248+1/496=1/16
再算1/2+1/4+1/8+1/16=15/16
所以 1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=15/16
跟guodeqi一样啦
x了
1/2+1/4+1/8+1/16+1/31+1/62+1/124+1/248+1/496
1/2+1/4+1/8+1/16+1/31+1/62+1/124+1/248+1/496
1/2+1/4+1/6+1/8+.1/n
|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+```+|1/2008-1/2006|
1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496=
计算:1/2+1/4+1/8+1/31+1/62+1/124+1/248+1/496 要有过程.
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2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
1/4-1/2+1/6-1/4+1/8-1/6+...+1/2008-1/2006计算题计算题1/4-1/2+1/6-1/4+1/8-1/6+...+1/2008-1/2006
求证:1+1/2+1/3+1/4+1/8+1/6+1/7+^+1/(2n-1)>n/2