观察下面一列数1,-2,-3,4,-5,6,.按如图所示的形式,2013是第()行左边第()个数?-12 -3 4-5 6 -7 8 -910 -11 12 -13 14 -15 16

问题描述:

观察下面一列数1,-2,-3,4,-5,6,.按如图所示的形式,2013是第()行左边第()个数?
-1
2 -3 4
-5 6 -7 8 -9
10 -11 12 -13 14 -15 16