3,8,9,0,-25,-72,(  )。A.-147 B.-144 C.-

考试题库2022-08-02  10

问题 3,8,9,0,-25,-72,(  )。A.-147B.-144C.-132D.-124

选项 A.-147
B.-144
C.-132
D.-124

答案 A

解析 依次将相邻两项后一项减前一项得5,1,-9,-25,-47,再次作差得-4,-10,-16,-22,是一个公差为(-6)的等差数列,即所填数字为-6+(-22)+(-47)+(-72)=-147。
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