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Could someone please elaborate on why 2x-6+sqrt(2-x) is not the answer in addition to sqrt(2-x)?

This is on page 28.

Am i a missing something?

Thank you.
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dimson
Could someone please elaborate on why 2x-6+sqrt(2-x) is not the answer in addition to sqrt(2-x)?

This is on page 28.

Am i a missing something?

Thank you.


Thanks for posting. This question happens to be a GMAT Club Tests question, so it is a bit tricky and has a few concepts wrapped in a seemingly simple question. You can find a long discussion explaining each step here:
https://gmatclub.com/forum/m08-183787.html
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bb thanks a bunch! I was looking for this discussion.

As a side note, just wanted to add a small comment. On my recent GMAT, i had to make an actual calculation of the STDEV. However, the STDEV formula was provided. - I didn't expect this concept to be tested and got quite nervous despite the fact that question, given my finance background, was not very hard. Thus, i believe sooner or later GMAC will start to explicitly test this concept.
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bb thanks a bunch! I was looking for this discussion.

As a side note, just wanted to add a small comment. On my recent GMAT, i had to make an actual calculation of the STDEV. However, the STDEV formula was provided. - I didn't expect this concept to be tested and got quite nervous despite the fact that question, given my finance background, was not very hard. Thus, i believe sooner or later GMAC will start to explicitly test this concept.


Thanks for the feedback from the trenches!
They have been mulling over the DTDEV for a while. They have not asked to memorize the formula but they do ask you to understand the relationship of the STDEV and Members in the set, as well as mean, mode, median, etc but these questions are rare.
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Great resource, thanks for putting this together. The app is also very easy to use - would recommend!
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Hi

Just wanted to say thank you for putting this together, certainly is of much help!

I'm using the app and going through the pdf pages, I can see there's probably about twice the amount of flashcards in the pdf that in the app, is that correct? Is there a way in which I could upload the missing ones?

Thank you so much in advance for your time,

Best
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Some of the questions answers are confusing, some state the answer is A, but never state what A even is, or even show available answers at all. Is there something I'm missing here? Cause Flashcards that don't tell you whether you are right or not aren't that helpful aside from the ones that explain basic concepts
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Thank you very much. It looks nice contents.
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Is there any chance you have this file in Powerpoint, Excell, Google docs, or word?

I would like to my own flashcard set and dont have any flexibility with the PDF set.

It is an amazing set of flashcards, and thank you very much all your work.

-Daniel S
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Great works bb. Is there desktop version for this flashcard please? Thanks
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