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Math Expert
Joined: 02 Sep 2009
Posts: 41871

Kudos [?]: 128551 [38], given: 12180

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05 Jun 2012, 03:58
38
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Expert's post
29
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BOOKMARKED

12 Rules for Posting - Please Read this Before Posting New Question

Following the simple rules and suggestions below can help you, other members, and our moderators to be happier people. Yes, truly, we will all be happier! When you create mis-catagorized, or poorly-posted quant questions, it leads to confusion and diminishes the valuable forum content. It also makes our lives stressful and disorganized. However, if you follow these 11 simple suggestions, you can expect great karma, good looks, and extra points on the GMAT! If by chance that did not convince you, ignoring or breaking these rules will likely lead to removed posts, warnings, eventual bans, and a possible hair loss. Please follow the rules. Thank you!

1. Use the Search Box Before Posting.

- We have 30,000 questions discussed. Chances are the one you wanted to post is already there.
- Forum Search

2. Choose the Right Forum.

- Please post PS questions in the PS subforum and DS questions in the DS subforum. No posting of PS/DS questions is allowed in the main Math forum.

3. Give a Topic Name (IMPORTANT).

- Use the first sentence of the question or a string of words exactly as they show up in the question. You get 40 characters. Use them all to help with the search & similar topics feature!

4. Post Only one Question per Topic.

- Please do not post multiple questions in the same post as it makes timer, search, tags, and other functions irrelevant.

5. Do not Change the Question.

- It is extremely important that the integrity of the original question is maintained. Remember, every word that is included in a question is there for a reason!

6. TYPE the Question and solution in as Text.

- Do not post pictures of questions or solutions. The only time a picture is acceptable is when a question has a diagram. If a diagram exists, make sure to always attach it using JPG/GIF/PNG formats. Do not use Word or PDF documents.

7. Indicate the OA (Official Answer)

- Use the A, B, C, D, E radio buttons and make sure you post the answer choices.

8. Post Answer Choices for PS Questions

- On the PS section one should always look at the answer choices before starts to solve a problem. They might often give a clue on how to approach the question.

9. Use Formulas that Look Like Formulas!

- Help us to help you. It is quite easy, and will increase the value of your questions. (See directions here: http://gmatclub.com/forum/11-rules-for- ... l#p1096628 or the discussion here: http://gmatclub.com/forum/writing-mathe ... 72468.html)

- At least 3 tags are required: difficulty level (in your opinion), question category, and source of the question. You are welcome to use more tags as applicable. You can also TAG other people’s posts to make them more valuable. You can see the positive results of using tags here: Data Sufficiency, Problem Solving, Critical Reasoning, Reading Comprehension, Sentence Correction. Also check our entire Question Bank by Tags.

11. Avoid Short/Useless Posts (they will be deleted) and use the Kudos Button Instead.

- If you choose to answer a question, please answer only if your post adds value. Saying “+1 A”, "Awesome solution!" or “Great Question!” does not. Pressing the Kudos button does.

12. ONLY Questions from Reliable GMAT Sources are Allowed on the Forum!

- Please do NOT post questions from random math books and web sites.

Thank you! We appreciate your understanding and support. Good luck on the GMAT!

Have any questions, suggestions, or ideas for this thread? Please PM the Math Forum Moderator, Bunuel.

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Kudos [?]: 128551 [38], given: 12180

Math Expert
Joined: 02 Sep 2009
Posts: 41871

Kudos [?]: 128551 [11], given: 12180

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14 Jun 2012, 06:54
11
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15
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Writing Mathematical Formulas on the Forum

I think that everybody will agree 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.

So, in order to help you with the questions you post more efficiently please use the following guide to write math formulas.

In most cases you'll just need to do 2-3 simple steps:

Simple Formulas

How to make 7x^2+5(x+3)>1 to look like $$7x^2+5(x+3)>1$$
Step 1: Highlight 7x^2+5(x+3)>1;
Step 2: Press m button.

Fractions

How to make (x+3)/(x+5)>0 to look like $$\frac{x+3}{x+5}>0$$:
Step 1: Highlight the fraction (x+3)/(x+5);
Step 2: Press fraction button;
Step 3: Now, highlight the whole expression and press m button.

Square roots

How to make (x+5)^(1/2)<17^(1/2) to look like $$\sqrt{x+5}<\sqrt{17}$$:
Step 1: Highlight x+5 and press square_root button, then highlight 17 and press square_root button again;
Step 2: Now, highlight the whole expression and press m button.

Other Useful Symbols

Another Way of Writing Fractions:
How to make (a+b)/c to look like $$\frac{a+b}{c}$$
Step 1: Write \frac{a+b}{c}, (note that numerator and denominator must be enclosed in { } and you must write out \frac to tell the system that it is a fraction);
Step 2. Highlight the whole expression and press m button.

Exponents
How to make x^12 to look like $$x^{12}$$
Step 1: Write x^{12}, (note that multi-digit powers must be enclosed in { });
Step 2. Highlight the whole expression and press m button.

Roots
How to make 3rd root of x^2 to look like $$\sqrt[3]{x^2}$$
Step 1: Write \sqrt[3]{x^2}, (note that 3 must be enclosed in [ ] and 2 must be enclosed in { });
Step 2. Highlight the whole expression and press m button.

Inequalities
$$x\approx{3}$$: write x\approx{3} and press m button (note that 3 must be enclosed in { }).
$$x\leq5$$: write x\leq{5} and press m button.
$$x\geq3$$: write x\geq{3} and press m button.
$$x\neq0$$: write x\neq{0} and press m button.

Subscript
$$x_1$$: write x_1 and press m button. If a subscript is more than one-digit number, for example $$x_{15}$$ then write x_{15} and press m button (note that such kind of subscripts must be enclosed in { }).

Geometry
$$\pi$$: write \pi and press m button;
$$\angle$$: write \angle and press m button;
$$90^{\circ}$$: write 90^{\circ} and press m button;
$$\alpha$$: write \alpha and press m button;
$$\triangle$$: write \triangle and press m button.

Full reference link for the extra curious: http://en.wikibooks.org/wiki/LaTeX/Mathematics#Math_operators

In case of Any Questions Please Post them Here: http://gmatclub.com/forum/writing-mathe ... 68-20.html or PM the Math Forum Moderator, Bunuel.
_________________

Last edited by Mahmud6 on 05 Aug 2017, 19:07, edited 3 times in total.
Typo

Kudos [?]: 128551 [11], given: 12180

Senior Manager
Status: The best is yet to come.....
Joined: 10 Mar 2013
Posts: 434

Kudos [?]: 163 [0], given: 181

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05 Aug 2017, 19:05
To embed fractions within fractions:

How to make ((x/4)/d) to look like $$\frac{\frac{x}{4}}{d}$$

Step 1: Write \frac{\frac{x}{4}}{d}
Step 2. Highlight the whole expression and press m button.
_________________

Hasan Mahmud

Kudos [?]: 163 [0], given: 181

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