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.
Aug 2610:00 AM EDT
-11:59 PM EDT
Save up to $1,000 on select GMAT prep now. This Fall, achieve your most ambitious goals with millions of student success stories behind you.
Aug 2710:00 AM EDT
-11:00 AM EDT
We’ve worked incredibly hard to build TTP into the best test prep experience possible, and it would mean a lot to us to win Newsweek’s 2026 Readers’ Choice Award for Best Test Prep. If TTP has helped you, we’d be incredibly grateful for your vote.
Sep 0609:30 AM EDT
-12:30 PM EST
Top scores are possible when you enroll in a powerful EA course, taught live online + 6 months access to TTP OnDemand video courses included! Perfect class schedule and easy course access for working professionals. Class starts Sept. 6, 9:30am-12:30pm EST
Sep 0907:00 AM PDT
-10:00 AM PDT
Meet AdComs and explore top Master’s programs - MiM, MiF, MSc, MSBA and more. - Application Fee Waivers - Free 1-Week of GMAT Club Tests: - Master's Application Toolkit - Grand Prize Giveaway
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 2108:00 PM EDT
-10:00 PM EDT
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Oct. 13, 2026 - Jan. 7, 2027, 8:00pm-10:00pm EST
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!
