(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)
来源:学生作业帮助网 编辑:六六作业网 时间:2025/02/01 05:38:02
(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)(1-1/2²)(1-1/3²)(1-1/4²).(1-1/1
(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)
(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)
(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)
(1-1/2²)(1-1/3²)(1-1/4²).(1-1/10²)
=1/2×3/2×2/3×4/3×3/4×5/4×...×9/10×11/10
=1/2×11/10
=11/20
您好:
(1-1/2²)(1-1/3²)(1-1/4²).......(1-1/10²)
=(1-1/2)(1+1/2)(1-1/3)(1+1/3)(1-1/4)(1+1/4)。。。(1-1/10)(1+1/10)
=1/2x3/2x2/3x4/3x3/4x5/4x...x9/10x11/10
=1/2x11/1...
全部展开
您好:
(1-1/2²)(1-1/3²)(1-1/4²).......(1-1/10²)
=(1-1/2)(1+1/2)(1-1/3)(1+1/3)(1-1/4)(1+1/4)。。。(1-1/10)(1+1/10)
=1/2x3/2x2/3x4/3x3/4x5/4x...x9/10x11/10
=1/2x11/10
=11/20
不明白,可以追问
如有帮助,记得采纳,谢谢
祝学习进步!
收起