(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2) (-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
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(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2) (-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2)
(-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
(1- 1/100)(1- 1/99) .....(1- 1/4)(1- 1/3)(1- 1/2) (-1 1/2)*(-1 1/3)*......(-1 1/6)*(-1 1/7)
通分,化简,约分即可.
1.99/100*98/99*...*3/4*2/3*1/2=1/100
2.(-3/2)²(-4/3)²....(-7/6)²(-8/7)²=9/4*16/9*...*64/49=64/4=8
*(乘号) (你的*意思是平方吗?)
题呢??
100*99+99*1
100×99+100×1
100+99+98+.+1?
1+2+.+99+100
99+1+100?
(100+99*1)+(99+99*2)+(98+99*3)+...+(2+99*99)+(1+99*100)
100+100-99-2+1
100*(100-1)*99
|1/100-1/99|+|1/101-1/100|-|1/100-1/99|=?
计算|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
求和:|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
|1/2-1|+|1/3-1/2|+.+|1/99-1/98|+|1/100-1/99|
计算:|100/1-99/1|+|101/1-100/1|-|101/1-99/1|
|1/100-1/99|+|1/101-1/100|-|1/101-1/99|
|1/101-1/99|-|1/100-1/99|-|1/100-1/101|=_____
|1/101-1/99|-|1/100-1/99|-|1/100-1/101|等于多少?
|1/101-1/99|-|1/100-1/99|-|1/100-1/101|
|1/101-1/99|-|1/100-1/99|-|1/100-1/101|,