(1+1/2002+1/2004+1/2006)X(1/2002+1/2004+1/2006+1/2008)X(1/2002+1/2004+1/2006)答对可获赏金
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 15:04:31
![(1+1/2002+1/2004+1/2006)X(1/2002+1/2004+1/2006+1/2008)X(1/2002+1/2004+1/2006)答对可获赏金](/uploads/image/z/2722362-42-2.jpg?t=%281%2B1%2F2002%2B1%2F2004%2B1%2F2006%29X%281%2F2002%2B1%2F2004%2B1%2F2006%2B1%2F2008%29X%281%2F2002%2B1%2F2004%2B1%2F2006%29%E7%AD%94%E5%AF%B9%E5%8F%AF%E8%8E%B7%E8%B5%8F%E9%87%91)
(1+1/2002+1/2004+1/2006)X(1/2002+1/2004+1/2006+1/2008)X(1/2002+1/2004+1/2006)答对可获赏金
(1+1/2002+1/2004+1/2006)X(1/2002+1/2004+1/2006+1/2008)X(1/2002+1/2004+1/2006)
答对可获赏金
(1+1/2002+1/2004+1/2006)X(1/2002+1/2004+1/2006+1/2008)X(1/2002+1/2004+1/2006)答对可获赏金
最后一个式子缺失1/2008
设1/2002+1/2004+1/2006=x
1/2002+1/2004+1/2006+1/2008=y
(1+1/2002+1/2004+1/2006)*(1/2002+1/2004+1/2006+1/2008)-(1+1/2002+1/2004+1/2006+1/2008)* (1/2002+1/2004+1/2006)
=(1+x)y-(1+y)x
=y+xy-x-xy
=y-x
=1/2008