please help.?

👨🏻‍🏫 學術台數學

2016-06-17 6:28 pm

If f(x) = 2x and f(f(x) = x+1 then x= ?

回答 (3)

2016-06-17 6:35 pm

✔ 最佳答案

f(x) = 2x

f(f(x)) = x + 1
f(2x) = x + 1
2(2x) = x + 1
4x = x + 1
3x = 1
x = 1/3

👍 1 👎 0

2016-06-17 7:41 pm

4x = x + 1
3x = 1
x = 1/3

👍 0 👎 0

2016-06-17 6:35 pm

1

👍 0 👎 0

收錄日期: 2021-04-18 15:05:55
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160617102834AAAFfSC

檢視 Wayback Machine 備份