求z的值 答案係-3....我要部x....
更新1:
打錯-.-sor
1條數學的題目
回答 (3)
2010-09-14 5:24 am
✔ 最佳答案
2^(6 - z) = 4^(6 + z)2^(6 - z) = 2^2(6 + z)
2^(6 - z) = 2^(12 + 2z)
6 - z = 12 + 2z
3z = -6
z = -2
驗算:
2^(6 + 2) = 2^8
4^(6 - 2) = 4^4 = 2^2^4 = 2^8
2010-09-14 7:18 am
2^6-z=4^6+z
2^6-z=2^12+2z
so............................
6-z=12+2z
-3z=12-6
-3z=-6
z=-2
2^6-z=2^12+2z
so............................
6-z=12+2z
-3z=12-6
-3z=-6
z=-2
2010-09-14 6:51 am
參考: me
收錄日期: 2021-04-19 23:13:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100913000051KK01387