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#1 Re: Help Me ! » Proof of inequality » Yesterday 21:15:09
lna: the Napierian logarithm of a (also the natural logarithm of a)
#2 Re: Help Me ! » Proof of inequality » Yesterday 15:27:40
Anyone can help me?
#3 Re: Help Me ! » Coordinate Geometry Question » Yesterday 03:52:07
I'm not good at english. I guess "touches the x axis" means it has only one intersection point with the x axis. Is that correct?
Do you know about vertical diameter theorem(the translator called this)? Draw a perpendicular line through the center of the circle to the intercept. The intercept is perpendicularly disseated by the line. Is that helpful?
#4 Help Me ! » Proof of inequality » 2025-08-06 15:36:00
- Liuz
- Replies: 5
How to prove the arithmetic square root of ab<(b-a)/(lnb-lna)<(a+b)/2
(b>a>0)
#5 Re: Maths Is Fun - Suggestions and Comments » Problem » 2025-08-06 14:21:22
Try "Luiz".
#7 Maths Is Fun - Suggestions and Comments » Problem » 2025-08-06 01:50:28
- Liuz
- Replies: 6
How can i change username?
#8 Re: Introductions » My first time to post. » 2025-08-06 00:37:16
Actually,i read the rules carefully to avoid breaking them. Although i read them again,i didn't find this rule. Maybe my english is not good. Anyway, i'll follow them.
#9 Re: Jai Ganesh's Puzzles » Oral puzzles » 2025-08-05 15:33:42
Oh,i see. I'm so sorry.
#11 Re: Jai Ganesh's Puzzles » Oral puzzles » 2025-08-05 14:46:31
I don't have the symbols i needed in my outdated phone. 
So i trid hard to translate it into english. Can you understand?
#13 Re: Exercises » Compute the solution: » 2025-08-04 21:19:49
Could you provide some exercises about it?
#14 Re: Exercises » Compute the solution: » 2025-08-04 20:31:01
Could you provide some questions of differentiating composite functions?
#15 Re: Help Me ! » From the entrance exam of The University of Tokyo » 2025-08-04 19:03:36
I get an idea.
#16 Re: Help Me ! » From the entrance exam of The University of Tokyo » 2025-08-04 18:13:27
Wow,thanks!
#17 Re: Exercises » Compute the solution: » 2025-08-04 17:32:16
It works.
#19 Re: Introductions » Forum Features » 2025-08-04 17:07:49
How to use hide tag?
#20 Re: Help Me ! » From the entrance exam of The University of Tokyo » 2025-08-04 15:46:53
One more question:prove pi is bigger than 3.
#21 Re: Help Me ! » From the entrance exam of The University of Tokyo » 2025-08-04 15:37:48
I have no idea.
#22 Help Me ! » From the entrance exam of The University of Tokyo » 2025-08-04 15:33:20
- Liuz
- Replies: 7
Prove:the square root of 2 is irrational number.
#23 Introductions » My first time to post. » 2025-08-04 15:08:43
- Liuz
- Replies: 4
As you know,our Chinese always have a lot of homework to deal with. So i think it's good to have a rest in this forum with math. Also, i can practice my english. It's win-win. 
My hometown is known as home of giant panda,and students ride them to school. Hahaha! Just joking. 
#24 Re: Introductions » Chinese seventh grader » 2025-08-04 14:50:12
Wow,I'm also a Chinese.
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