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