Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products.
May 1308:30 AM PDT
-09:30 AM PDT
In Episode 4 of our GMAT Ninja CR series, we tackle the most intimidating CR question type: Boldface & "Legalese" questions. If you've ever stared at an answer choice that reads, "The first is a consideration introduced to counter a position that...- May 12
07:30 AM PDT
-08:30 AM PDT
Join the Live and learn more about Picking the Right Schools - May 14
08:30 AM PDT
-09:30 AM PDT
Most GMAT test-takers are intimidated by the hardest GMAT Verbal questions. In this session, Target Test Prep GMAT instructor Erika Tyler-John, a 100th percentile GMAT scorer, will show you how top scorers break down challenging Verbal questions.. - Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
19 Oct 2005, 12:40
Kudos
Bookmarks
i have a general question as I just came across a problem in the online guide that asked for the cube root of a negative number. I thought you couldn't root negative numbers so I said undefined for the answer...which was wrong.
So.....is it that you can never sq. rt neg numbers but you can cube root neg. numbers since a neg. number cubed is also negative. Is that the correct thinking?
thx
So.....is it that you can never sq. rt neg numbers but you can cube root neg. numbers since a neg. number cubed is also negative. Is that the correct thinking?
thx
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
19 Oct 2005, 12:58
Kudos
Bookmarks
I look at it this way, and it may not be the correct way, but it has worked for me so far. negatives cannot have even roots, but can have odd roots. For instance:
sqrt(-9)=x, -9=x^2. It is undefined because any number to an even power is positive.
cube root(-27)=x, -27=x^3. This is defined as x=-3.
I hope this hels.
Also, on a similar note. Just as an example, what do you guys define sqrt(9) as. I have seen debate as to if the answer is just 3, or -3 and 3. What are your guys thoughts?
sqrt(-9)=x, -9=x^2. It is undefined because any number to an even power is positive.
cube root(-27)=x, -27=x^3. This is defined as x=-3.
I hope this hels.
Also, on a similar note. Just as an example, what do you guys define sqrt(9) as. I have seen debate as to if the answer is just 3, or -3 and 3. What are your guys thoughts?
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
