(1+2/1)*(1+4/1)*(1+6/1)*...*(1+20/1)*(1-3/1)*(1-5/1)*(1-7/1)
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/25 13:53:35
(1+2/1)*(1+4/1)*(1+6/1)*...*(1+20/1)*(1-3/1)*(1-5/1)*(1-7/1)*...*(1-21/1)
等于多少
等于多少
(1+1/2)×(1+1/4)×(1+1/6)×……×(1+1/20)×(1-1/3)×(1-1/5)×(1-1/7)×……×(1-1/21)
=3/2×5/4×7/6×……×21/20×2/3×4/5×6/7×……×20/21
=(3/2×2/3)×(5/4×4/5)×(7/6×6/7)×……×(21/20×20/21)
=1×1×1×……×1
=1
=3/2×5/4×7/6×……×21/20×2/3×4/5×6/7×……×20/21
=(3/2×2/3)×(5/4×4/5)×(7/6×6/7)×……×(21/20×20/21)
=1×1×1×……×1
=1
(1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1
(1-1/2^2)(1-1/3^2)(1-1/4^2)(1-1/5^2)(1-1/6^2)(1\1/7^2)(1-1/8
1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1
1/2+1/2*1/3+1/3*1/4+1/4*1/5+1/5*1/6+1/6*1/7+.1/1999*1/2000得多
1、求|1-1/2|+|1/2-1/3|+|1/3-1/4|+|1/4-1/5|+|1/5-1/6|+|1/6-1/7|
2/1 3/1 4/1 5/1 6/1 8/1 10/1 12/1 15/1 20/1
(1)1+1/2+1/3+1/4+1/5+1/6+1/7+1/14+1/28
(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)*…*(1-1/19)*(1-1/20)=
(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+1/3-1/4+1/5-1/6+1/7-1/8+1/9……+1/19-1/20=?
-1/2,+1/3,-1/4,+1/5,-1/6,.
线性代数解行列式1/2 1/3 1/4 1/51/3 1/4 1/5 1/61/4 1/5 1/6 1/7 1/5 1/