Forgot password
 Register account
View 1581|Reply 3

来自人教群的幂指极限

[Copy link]

673

Threads

110K

Posts

218

Reputation

Show all posts

kuing posted 2015-7-30 03:38 |Read mode
辽V教师qzsb(2422****)  22:38:35
QQ截图20150730033745.jpg
肿么破?我算了下似乎是1,比较复杂还不知对8对……

24

Threads

1017

Posts

46

Reputation

Show all posts

战巡 posted 2015-7-30 11:34
回复 1# kuing


\[x^x=e^{x\ln(x)}=1+x\ln(x)+o(x\ln(x))\]
\[x^x-1=x\ln(x)+o(x\ln(x))\]
所以有$x\to0$时
\[x^x-1\sim x\ln(x)\]
\[\lim_{x\to 0}x^{(x^x-1)}=\lim_{x\to 0}x^{x\ln(x)}=\lim_{x\to 0}e^{x\ln^2(x)}=1\]

673

Threads

110K

Posts

218

Reputation

Show all posts

original poster kuing posted 2015-7-30 13:15
回复 2# 战巡

nice,这个简单,我的暴力解法可以扔了……

2

Threads

57

Posts

0

Reputation

Show all posts

caijinzhi posted 2015-7-30 23:22
回复 2# 战巡

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

2025-7-21 12:17 GMT+8

Powered by Discuz!

Processed in 0.014128 seconds, 25 queries