来自靳晓蕾的问题
【找规律4,9,12,17,21,26,27,,,47,54】
找规律4,9,12,17,21,26,27,,,47,54
1回答
2020-09-26 08:57
【找规律4,9,12,17,21,26,27,,,47,54】
找规律4,9,12,17,21,26,27,,,47,54
奇数项:4..12..21..27..?..54
分组:(4..12)(21..27)(?..54)差分别为8..6..4耳机差为2
?=50
偶数项:9..17..26..?..47
逐项差:8..9..10..11
?=36
4...9...12...17...21...26..27...36..50..47..54