唔識呀...
更新1:
3(3^x)-3^x-1=216
更新2:
我既問題應該係→http://i132.photobucket.com/albums/q25/ling_ling923/264102162921517.jpg
3(3^x)-3^x-1=216
我既問題應該係→http://i132.photobucket.com/albums/q25/ling_ling923/264102162921517.jpg
收錄日期: 2021-04-24 22:43:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061026000051KK03602