8,23,27,80,84,251,255,( ).A.764 B.668 C.686 D.866

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8,23,27,80,84,251,255,( ).A.764 B.668 C.686 D.866
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8,23,27,80,84,251,255,( ).A.764 B.668 C.686 D.866
8,23,27,80,84,251,255,( ).A.764 B.668 C.686 D.866

8,23,27,80,84,251,255,( ).A.764 B.668 C.686 D.866
A、764
8
8*3-1=23
8*3+3=27
27*3-1=80
27*3+3=84
84*3-1=251
84*3+3=255
255*3-1=764