Maths problem how to do?
回答 (1)
2019-07-25 11:28 am
✔ 最佳答案
solSet A=3^x>0
9^(x+2)=36
9^x*81=36
9^x=36/81
A^2=4/9
A=2/3>0
收錄日期: 2021-04-11 23:00:50
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190724232545AANWNqI