(1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)简算
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(1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)简算
你好:
(1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)
=(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+10/1)*(1-1/3*.*(1-1/9)
=3/2*5/4*7/6*9/8*11/10*2/3*4/5*6/7*7/8*8/9
=(3/2*2/3)(5/4*4/5)(7*6*6/7)(9/8*8/9)*11/10
=11/10
(1+1/2)*(1+1/4)*.*(1+1/10)*(1-1/3)*(1-1/5)*.(1-1/9)
=(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+10/1)*(1-1/3*.*(1-1/9)
=3/2*5/4*7/6*9/8*11/10*2/3*4/5*6/7*7/8*8/9
=(3/2*2/3)(5/4*4/5)(7*6*6/7)(9/8*8/9)*11/10
=11/10
/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/
简算:(1+1/2+1/3+1/4)×(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)×(1/
简算:(1+1/3+1/5+1/10+1/15+1/30)÷(1/2+1/4+1/6+1/12+1/20+1/60)=?
(1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10+1/11+1/12+1/13+1/14+1/
|1-1/2|+|1/2-1/3|+|1/3-1/4|+...|1/9-1/10|
|1-1/2|-|1/2-1/3|-|1/3-1/4|-.-|1/9-1/10|
1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10等于多少?
(1+2/1)(1+4/1)(1+6/1).(1+10/)(1-3/1)(1—5/1).(1-9/1)
1/1x2+1/2x3+1/3x4+1/4x5.1/9x10简算
|3/1-2/1|+|4/1-3/1|+|5/1-4/1|+...+|10/1-9/1|=?3Q
计算:1/2×1/3+1/3×1/4+1/4×1/5+…+1/9×1/10
绝对值|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+…+|1/10-1/9|