找规律 2,-4,8,-16,32,-64...

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找规律2,-4,8,-16,32,-64...找规律2,-4,8,-16,32,-64...找规律2,-4,8,-16,32,-64...数列通项:2的n次方×(-1)的(n-1次方)128An=(-

找规律 2,-4,8,-16,32,-64...
找规律 2,-4,8,-16,32,-64...

找规律 2,-4,8,-16,32,-64...
数列通项:2的n次方×(-1)的(n-1次方)

128

An=(-1)^(n+1)*2^n。
希望满意采纳。

128,-256,512