IF
1 @ 4 =10
2 @ 5 =14
6 @ 10 = 40
9 @ 11 = 30
Please find the formula for @ between these equations.
THanks a lot!!
奧數問題 要求formula
2012-10-21 7:38 pm
回答 (1)
2012-10-21 10:51 pm
✔ 最佳答案
Note that (1 + 4 - 1) (4 + 1) = 20 = 2 * 10(1 + 5 - 2) (5 + 2) = 28 = 2 * 14 (1 + 10 - 6) (10 + 6) = 80 = 2 * 40 (1 + 11 - 9) (11 + 9) = 60 = 2 * 30Suggested formula : x @ y = (1/2) (1 + y - x) (y + x)
收錄日期: 2021-04-21 22:25:56
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https://hk.answers.yahoo.com/question/index?qid=20121021000051KK00148