1+(-2)+(+3)+(-4)+(+5)+...+(-2008)+(+2009)
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:2024/08/07 02:20:27
1+(-2)+(+3)+(-4)+(+5)+...+(-2008)+(+2009)
![1+(-2)+(+3)+(-4)+(+5)+...+(-2008)+(+2009)](/uploads/image/z/16198310-38-0.jpg?t=1%2B%EF%BC%88-2%EF%BC%89%2B%EF%BC%88%2B3%EF%BC%89%2B%EF%BC%88-4%EF%BC%89%2B%EF%BC%88%2B5%EF%BC%89%2B...%2B%EF%BC%88-2008%EF%BC%89%2B%EF%BC%88%2B2009%EF%BC%89)
1+(-2)+(+3)+(-4)+^+(-2008)+(2009)
=1-2+3-4+^-2008+2009
=(1-2)+(3-4)+^+(2007-2008)+2009
=-1-1-1-1-^-1+2009
=-1004*1+2009
=1005
再问: 过程写的太乱,请详细。-1-1-1-1例如上太乱
再答: 多详细啊
=1-2+3-4+^-2008+2009
=(1-2)+(3-4)+^+(2007-2008)+2009
=-1-1-1-1-^-1+2009
=-1004*1+2009
=1005
再问: 过程写的太乱,请详细。-1-1-1-1例如上太乱
再答: 多详细啊
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