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Writing Mathematical Formulas in the GMAT Club Forums This

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Writing Mathematical Formulas in the GMAT Club Forums This  [#permalink]

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New post Updated on: 21 Nov 2013, 14:11
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Writing Mathematical Formulas in the GMAT Club Forums

This post is just for those curious about writing neat maths formulae in forum posts... I looked it up because I was typing out questions and wanted to use symbols such as \(\leq\) rather than writing the <= symbol (I was using quite a few of them, which was starting to look confusing)
Don't you think that \({(\sqrt{9+sqrt{80}}+\sqrt{9-\sqrt{80}})^2}\) is much easier to understand than – (sqr root of (9 +sqr root of 80)+sqr root of (9 - sqr root 80))^2?

The simple instructions:
(1) write formula as usual, e.g. x^2 + (x+3)^2 > 1
(2) highlight the text that is a formula, and then click the "m" button at the top of the edit box. This will enclose it with little "m" boxes (similar to adding color to a part of text), and tells the forum to display your text as a formula: \(x^2 + (x+3)^2 > 1\)
(3) that's it, simple. Most formula will display automatically. Fractions, roots and other exceptions are below.

You can also see the detailed post by Bunuel here: rules-for-posting-please-read-this-before-posting-133935.html#p1096628


Common symbols that can be used within your formula (selected with GMAT in mind):

Fractions:
\(\frac{a+b}{c}\) --- \frac{a+b}{c} - note that numerator and denominator have to be enclosed in {} and you have to write out \frac to tell the system that it is a fraction.

Powers and roots
\(x^2\) --- x^2
\(x^{12}\) --- x^{12} - note that multi-digit powers require {}

\(\sqrt{x}\) --- \sqrt{x} - note the {} and \sqrt to identify the square root
\(\sqrt[n]{x}\) --- \sqrt[n]{x}


Inequalities
\(\approx\) --- \approx
\(\leq\) --- \leq
\(\geq\) --- \geq
\(\neq\) --- \neq


Subscript
\(x_1, x_2\) --- x_1, x_2


Geometrical
\(\pi\) --- \pi
\(90^{\circ}\) --- 90^{\circ}
\(\alpha\) --- \alpha
\(\angle\) --- \angle
\(\triangle\) --- \triangle

Full reference link for the extra curious:
http://en.wikibooks.org/wiki/LaTeX/Mathematics#Math_operators
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2013-11-21_1309.png
2013-11-21_1309.png [ 50.59 KiB | Viewed 4905 times ]


Originally posted by prince13 on 05 Nov 2008, 08:33.
Last edited by bb on 21 Nov 2013, 14:11, edited 28 times in total.
Added Math Expressions
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Re: Writing Mathematical Formulas in the GMAT Club Forums This  [#permalink]

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New post 09 Jan 2013, 16:25
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Hello Bunuel, below two signs in "Rules of posting" are displaying same formulas.

Could you please replace "\leg" with "\geq" for greater than or equal to sign?

Attachment:
Rules of Posting.jpg
Rules of Posting.jpg [ 86.41 KiB | Viewed 2464 times ]

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Re: Writing mathematical symbols in posts  [#permalink]

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New post 16 Jun 2009, 12:40
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nookway wrote:
Hello bb, I need your help. Is there a master list of all the symbols. I was trying to get the angle symbol and based on Latex website it should be \angle however this results into another type of angle symbol \(\angle\) on Gmatclub forums. Hopefully you can point to the right source.

Thanks!


Nookway - thank you for your commitment to the math symbols - your math posts rock!
Let me research with the tech experts. I believe the \angle one works with GMAT Tests - not sure why it would not work here....
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 17 Jun 2009, 01:46
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Hi nookway,

I believe the symbols look different because we use slightly different software. We use the same '\angle' -> \(\angle\) symbol in our Math Tests.

There are two other types of angle symbols, but I'm not sure they are intended for geometry:
\(\langle\) - \langle
\(\rangle\) - \rangle


Hope this helps

nookway wrote:
Hello bb, I need your help. Is there a master list of all the symbols. I was trying to get the angle symbol and based on Latex website it should be \angle however this results into another type of angle symbol \(\angle\) on Gmatclub forums. Hopefully you can point to the right source.

Thanks!
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 22 Jun 2009, 15:41
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Hi dzyubam,

Thanks for the clarification. It does seem there are some differences. \(\angle\) should work for me. The symbol I was referring to can be seen in the image below.

Attachment:
angle.gif
angle.gif [ 1.17 KiB | Viewed 17410 times ]


Thanks again,

Nookway
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 11 Mar 2009, 07:27
awesome find ... +1 from me as well.
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 10 Jun 2009, 14:20
+1 from me.
I am so addicted..and it makes things much clearer. Thank you.
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New post 13 Jun 2009, 18:50
Original post updated with additional expressions.
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New post 14 Jun 2009, 10:25
Thanks for this post.
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 16 Jun 2009, 11:28
Hello bb, I need your help. Is there a master list of all the symbols. I was trying to get the angle symbol and based on Latex website it should be \angle however this results into another type of angle symbol \(\angle\) on Gmatclub forums. Hopefully you can point to the right source.

Thanks!
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 17 Jul 2009, 19:35
This will make the posts very clear.However I tried the fraction and it did'nt work.Could you tell me where I went wrong to save you the trouble in future posts?thanks!
problem-solving-question-on-ratios-79240.html#p607940
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 17 Jul 2009, 20:58
tejal777 wrote:
This will make the posts very clear.However I tried the fraction and it did'nt work.Could you tell me where I went wrong to save you the trouble in future posts?thanks!
problem-solving-question-on-ratios-79240.html#p607940


Thank you for asking!

Code:
You did everything right, just needed to put [m] tag in the beginning and [/m] in the end.
The M-tags (there is an "m" button) are used to identify beginning and end of the area that you want to be converted into a math symbol

I added them to your post - you can see the code if you hit EDIT
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New post 01 Nov 2009, 20:14
Now next is being able to draw figures...maybe venn diagrams could be done simply?
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Re: Writing mathematical symbols in posts  [#permalink]

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New post 07 Mar 2010, 22:36
Nice...
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New post 08 Mar 2010, 14:52
monirjewel wrote:
Nice...

1. Slightly wrong topic to post this.
2. The time conversion formula you suggested does not always work. For example if you have 135 minute and 200 minutes, you will get 335, add 40 and you will get 375... what do you do with that?
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New post 16 Mar 2010, 03:40
Can someone suggest how to use the modulus operator?
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New post 16 Mar 2010, 04:26
I'd just use the "|" signs to enclose a particular expression. See an example below.

\(\sqrt{x^2} = |x|\)

Code:
[m]\sqrt{x^2} = |x|[/m]


abhi758 wrote:
Can someone suggest how to use the modulus operator?
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New post 20 Mar 2010, 23:44
Thanks for the post !
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New post 17 May 2010, 07:28
great, you have made the job easy.
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New post 31 May 2010, 23:13
very helpful post..thanks
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Re: Writing mathematical symbols in posts   [#permalink] 31 May 2010, 23:13

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