如果係1...3...9...27...
的數型是什麼?
數型問題．都幾深^^
2008-08-18 6:49 pm
回答 (1)
2008-08-18 6:54 pm
✔ 最佳答案
General Term : 3^(n - 1)Second term / First term = 3/1 = 3 = r
Third Term / Second Term = 9/3 = 3 = r
First Term = 1 = a
By the formula a * r^ (n- 1)
i.e. 3^(n - 1)
2008-08-22 15:46:38 補充：
若果是 ?n 就諗唔到,
但係呢個一定岩....
收錄日期: 2021-04-13 16:00:16
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080818000051KK00840