Forgot password?
 Register account
View 2227|Reply 9

[函数] 请教一个有关零点问题:

[Copy link]

413

Threads

905

Posts

110K

Credits

Credits
10989

Show all posts

lemondian Posted 2017-11-2 15:28 |Read mode
QQ截图20171102152648.jpg

770

Threads

4692

Posts

310K

Credits

Credits
35048

Show all posts

isee Posted 2017-11-2 15:45
Last edited by isee 2017-11-2 15:51回复 1# lemondian


    化成$a^x$与$\abs{\log_ax}$交点问题。这好像是个经典易错题,kuing好像有讨论,等k发源。

413

Threads

905

Posts

110K

Credits

Credits
10989

Show all posts

 Author| lemondian Posted 2017-11-2 15:48
回复 2# isee
思路是这样的,但a的取值不同,好象结果也不一样哩

13

Threads

907

Posts

110K

Credits

Credits
12299

Show all posts

色k Posted 2017-11-2 16:18
回复 2# isee

那题的链接在人教论坛,暂时打不开,看《数学空间》第2014第2期(总第16期)的《错题集》吧

413

Threads

905

Posts

110K

Credits

Credits
10989

Show all posts

 Author| lemondian Posted 2017-11-2 16:49
回复 4# 色k

看到了,谢谢!

686

Threads

110K

Posts

910K

Credits

Credits
91229
QQ

Show all posts

kuing Posted 2018-1-9 17:25
回复 4# 色k

今天总算能上了,动图演示见:
bbs.pep.com.cn/forum.php?mod=viewthread&tid=950555
(咦?变成 https 了,之前没 s)

770

Threads

4692

Posts

310K

Credits

Credits
35048

Show all posts

isee Posted 2018-1-9 22:44
回复 6# kuing


    我擦,我还去了封电子邮件,没理我,今天倒是开了。。。。

686

Threads

110K

Posts

910K

Credits

Credits
91229
QQ

Show all posts

kuing Posted 2018-1-9 22:48
回复 7# isee

莫非是因为你

770

Threads

4692

Posts

310K

Credits

Credits
35048

Show all posts

isee Posted 2018-1-9 22:53
回复 8# kuing

12月22号发的,应该与我没关系.

686

Threads

110K

Posts

910K

Credits

Credits
91229
QQ

Show all posts

kuing Posted 2018-1-14 02:18
回复 9# isee

话说,那边现在虽然能打开但帐号登录不上,一登就变空白,然后刷新或后退也变成空白,得过一会儿才能再次打开,而且还是游客状态,不知你那是不是一样?

Mobile version|Discuz Math Forum

2025-5-31 11:14 GMT+8

Powered by Discuz!

× Quick Reply To Top Edit