Forgot password
 Register account
View 1448|Reply 3

$f_n(n)=f(n+1)$

[Copy link]

461

Threads

959

Posts

4

Reputation

Show all posts

青青子衿 posted 2013-11-22 19:12 |Read mode
已知$f_n(x)$表示函数$f(x)$的$n$次迭代,则求满足$f_n(n)=f(n+1)$的函数$f(n)$

7

Threads

52

Posts

0

Reputation

Show all posts

icesheep posted 2013-11-22 21:58
n=0 得出 f(0)=f(1)=0
n=1 得出 f(1)=f(2)=0
n=2 得出 f(2)=f(3)=0
...

461

Threads

959

Posts

4

Reputation

Show all posts

original poster 青青子衿 posted 2013-11-23 08:45
回复 2# icesheep
n=0 得出 f(0)=f(1)=0
n=1 得出 f(1)=f(2)=0
n=2 得出 f(2)=f(3)=0
...
icesheep 发表于 2013-11-22 21:58
如果是定义在正整数集上的呢?

7

Threads

52

Posts

0

Reputation

Show all posts

icesheep posted 2013-11-23 21:53
解不唯一,懒得想了。

Quick Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register account

$\LaTeX$ formula tutorial

Mobile version

2025-7-19 21:13 GMT+8

Powered by Discuz!

Processed in 0.012975 seconds, 22 queries