1 4 14 31 55 ( )
2023-06-09
A. 83
B. 84
C. 85
D. 86
参考答案:D
B. 84
C. 85
D. 86
参考答案:D
解题指导: 二级等差数列,相邻两项的差为3,10,17,24,(31),故答案为D。
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2023-06-09
解题指导: 二级等差数列,相邻两项的差为3,10,17,24,(31),故答案为D。
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