更新1:
2^(x)-2^(3-x)=7 Solve x. Thanks!
2^(x)-2^(3-x)=7 Solve x. Thanks?
回答 (1)
收錄日期: 2021-04-18 14:18:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160113051802AAjI2Nx