2,-4,8,-16,32,-64.第n个数为?

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 19:06:50

2,-4,8,-16,32,-64.第n个数为?
2,-4,8,-16,32,-64.第n个数为?

2,-4,8,-16,32,-64.第n个数为?
2,-4,8,-16,32,-64.第n个数为:(-1)^(n+1)×2^n

(-1)的n-1次幂 乘以2的n次幂
(-1)^(n-1)*2^n