1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/16 17:40:04
1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?1/2+1/5+1/8+1/11+

1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?
1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1
则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?

1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1则1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=?
已知:1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1
两边同时减1/2
得:1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1/2
-(1/5+1/8+1/11+1/20+1/41+1/110+1/1640)=-1/2
1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=1/2-(1/5+1/8+1/11+1/20+1/41+1/110+1/1640)=1/2-1/2=0

1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640
=1/2-(1/5+1/8+1/11+1/20+1/41+1/110+1/1640)
=1/2-(1-1/2)
=0

0 ,设a=1/5+1/8+1/11+1/20+1/41+1/110+1/1640,0.5+a=1
所以a=0.5
所以1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=0.5-a=0.5-0.5=0

-1/2

0
a=1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1
b=1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640
a+b=1/2+1/2=1,因为a=1,所以b=0

1

1/5+11/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=1-1/2=1/2
1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=1/2-1/2=0

0(需将1/2移到等号右面,再乘-1,最后两边同加1/2)

1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640
= -(1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640)+1
=-1+1
=0

宝宝路过~~~嘻嘻 嘿嘿 呵呵

1/2+1/2-1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640
=1/2+1/2-(1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640)
=2/2-1
=0
呵呵,我是这么认为的,应该不错吧,

∵1/2+1/5+1/8+1/11+1/20+1/41+1/110+1/1640=1
∴-1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=-1
∴-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=-1+1/2=-1/2
∴1/2-1/5-1/8-1/11-1/20-1/41-1/110-1/1640=1/2-1/2=0