-2,4,-8,16,-32,64； 0,6,-6,18,-30,66； -1,2,-4,8,-16,32；找规律,写出n个数 _数学解答

-2,4,-8,16,-32,64； 0,6,-6,18,-30,66； -1,2,-4,8,-16,32；找规律,写出n个数；找出关
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人气：216 ℃　时间：2019-12-06 00:13:35

解答

-2,4,-8,16,-32,64；an=(-2)^n
0,6,-6,18,-30,66；an=? 确定题目没错?
-1,2,-4,8,-16,32；an=-(-2)^(n-1)