-2,1,-8/27,1/16,( ) A.-32/3125B.32/3125C.-64/3125D.-128/3125

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-2,1,-8/27,1/16,( ) A.-32/3125B.32/3125C.-64/3125D.-128/3125
-2,1,-8/27,1/16,( ) A.-32/3125B.32/3125C.-64/3125D.-128/3125

-2,1,-8/27,1/16,( ) A.-32/3125B.32/3125C.-64/3125D.-128/3125
An=(-2/n)^n
A5=(-2/5)^5=-32/3125

原数值可转换成(-2/1)^1 (-2/2)^2 (-2/3)^3 (-2/4)^4
所以第五个数值为(-2/5)^5=-32/3125