找规律, 2,2,4,8,14,26,48,88___? 1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008的和是

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 10:42:29
找规律,     2,2,4,8,14,26,48,88___?  1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008的和是

找规律, 2,2,4,8,14,26,48,88___? 1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008的和是
找规律, 2,2,4,8,14,26,48,88___? 1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008的和是

找规律, 2,2,4,8,14,26,48,88___? 1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008的和是
从第4个数开始,每个数等于前三个数的和.2+2+4=8 2+4+8=14 8+14+26=48 14+26+48=88 所以:26+48+88=162
1,-2,-3,4,5,-6,-7,8,9``````,2005,-2006,-2007,2008
=1+2×(2009-1)/2-2009
=0
还有什么不明白的地方再问我.