# Help

Note by Ankit Kumar Jain
4 years, 5 months ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$ ... $$ or $ ... $ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

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We have removed that functionality.

Staff - 4 years, 5 months ago

Sir, So will you write the feedback on the solution or is the feature removed?

- 4 years, 5 months ago

The functionality of "request feedback from challenge master" has been removed.

Staff - 4 years, 5 months ago

@Calvin Lin Sir , recently I posted two questions ..the problem name changed automatically.

Like I named the problem 'Strange' , it changed to 'A geometry problem by Ankit Kumar Jain.

- 4 years, 5 months ago

We remove titles that are meaningless to the problem.

Staff - 4 years, 5 months ago

Okay sir .

Sir , can you please suggest some name for the problem I mentioned above so that I can get some idea and I can try to give names that are meaningful from next time.

- 4 years, 5 months ago

I was reading the wiki On AM - GM Inequality .In it I found out that there was a proof which said that it requires a bit of combinatorics . In the last bit of the proof , it said

$k > m_g > 0 \Rightarrow m_g \in {(0 , k)}$

$k \geq m_a > 0 \Rightarrow m_a \in {(0 , k]}$.

From these how does it follow that $m_a \geq m_g$ ?

- 4 years, 5 months ago

- 4 years, 3 months ago

I don't know what $k, m_a$ and $m_g$ represents. So I can't help you with that...

- 4 years, 3 months ago

Sir $m_a$ is the arithmetic mean and $m_g$ is geometric mean and $k$ is some constant.

- 4 years, 3 months ago

AM-GM .In the proof that says 'It requires a bit of combinatorics' , that one.

- 4 years, 3 months ago

Where? I don't know which book or article you are looking at...

- 4 years, 3 months ago

I have posted the link to the source right in my previous comment. It is the brilliant wiki page on AM- GM Inequality.

- 4 years, 3 months ago