更新1:
係 (17/19)^(5x-3)=1 點解無啦啦5x-3會=0??
FA數學題..(有10分""趕急)
回答 (2)
2006-12-01 5:33 am
✔ 最佳答案
題目5清楚...係{(17/19)^5x}-3=1----(1)定(17/19)^(5x-3)=1 -----(2)CASE1:{(17/19)^5x}-3=1
(17/19)^5x=4
5x(log17-log19)=log4
x=log4/5(log17-log19)
case2: (17/19)^(5x-3)=1
5x-3=0
x=3/5
參考: BY EASON-MENSA
2006-12-01 6:53 am
(17/19)^(5x-3)=1
(5x-3)ln(17/19)=0
5x-3=0
x=3/5
(5x-3)ln(17/19)=0
5x-3=0
x=3/5
收錄日期: 2021-04-25 13:48:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061130000051KK04040