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
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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+...+1/2008-1/20061/4-1/2+1/6-
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
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
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
1/4-1/2+1/6-1/4+1/8-1/6+...+1/2008-1/2006
= -1/2 + (1/4 - 1/4) + (1/6 - 1/6) +...+ (1/2006 - 1/2006) + 1/2008
= 1/2008 - 1/2
= -1003/2008
1/4-1/2+1/6-1/4+1/8-1/6+...+1/2008-1/2006
=1/2008-1/2
=-1003/2008
原式=-1/2+1/2008(整理可得）
再通分，得结果为-1003/2008
|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+```+|1/2008-1/2006|
1/2+1/4+1/6+1/8+.1/n
2/1+4/1+4/1+6/1+8/1+16/1+32/1=?
1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少?
((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*((1/6)-1)*((1/7)-1)*((1/8)-1)*((1/9)-1)*((1/10)-1)
1/2*4+1/4*6+1/6*8+1/8*10+---+1/198*200
[2^4+1/4)(4^4+1/4)(6^4+1/4)(8^4+1/4)(10^4+1/4)】/[1^4+1/4)(3^4+1/4)(5^4+1/4)(7^4+1/4)(9^4+1/4)]
4,2,1,1/2,1/4,（ ) ( ) ( )1/8,1/32,1/4 ,1/16( )( ) ( )1/2,1/6,1/12,1/20,1/30,1/42 ( ) ( ) ( )
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
1+1/2+4+1/2+4+6+1/2+4+6+8+.+1/2+4+6+8...+20
1+1+2+1+2+6+4+5+8等于
9*(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*(1-1/7)*(1-1/8)*(1-1/9)怎样简便计算
计算:|4/1-2/1|+|6/1-4/1|+|8/1-6/1|+.+|2008/1-2006/1|
计算 ｜1/4-1/2｜+｜1/6-1/4｜+｜1/8—1/6｜+.+｜1/2008-1/2006｜
|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+……+|1/2008-1/2006|是多少
（2/1-4/1）+（4/1-6/1）+（6/1-8/1）+.+（48/1-50/1）
计算:|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+…+|1/2008-1/2006|1003/2008
求|1/4-1/2|+|1/6-1/4|+|1/8-1/6|+.+|1/100-1/98|的值