(-1)+(+2)+(+3)+(+4)+…(-2007)+(+2008)+(-2009)+(+20010) 怎么算
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 02:49:14
![(-1)+(+2)+(+3)+(+4)+…(-2007)+(+2008)+(-2009)+(+20010) 怎么算](/uploads/image/z/2734533-45-3.jpg?t=%28-1%29%2B%28%2B2%29%2B%28%2B3%29%2B%28%2B4%29%2B%E2%80%A6%28-2007%29%2B%28%2B2008%29%2B%28-2009%29%2B%28%2B20010%29+%E6%80%8E%E4%B9%88%E7%AE%97)
(-1)+(+2)+(+3)+(+4)+…(-2007)+(+2008)+(-2009)+(+20010) 怎么算
(-1)+(+2)+(+3)+(+4)+…(-2007)+(+2008)+(-2009)+(+20010) 怎么算
(-1)+(+2)+(+3)+(+4)+…(-2007)+(+2008)+(-2009)+(+20010) 怎么算
原式=[(-1)+(+2)]+[(-3)+(+4)]+……+[(-20009)+(+20010)]
=1*(20010/2)
=10005