Target Test Prep 20% Off Flash Sale is on! Code: FLASH20

Redeem
Target Test Prep
5-Day Free Trial
5-day free, full-access trial TTP

Available with Beat the GMAT members only code

MORE DETAILS
Target Test Prep
Magoosh
Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

MORE DETAILS
Magoosh

Is this sufficient?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Newbie | Next Rank: 10 Posts
Posts: 1
Joined: Thu Apr 10, 2008 12:27 am

Is this sufficient?

by sudimba » Sat May 31, 2008 10:14 pm
I saw this on on some website and was asked to calculate if this was sufficient
(x^2)*(1-x^3) <0.

I recall the next entry was
x^2<x^5. How is this possible?

Thanks.
Top
User avatar
GMAT Instructor
Posts: 3225
Joined: Tue Jan 08, 2008 2:40 pm
Location: Toronto
Thanked: 1710 times
Followed by:614 members
GMAT Score:800

Re: Is this sufficient?

by Stuart@KaplanGMAT » Sat May 31, 2008 10:42 pm
sudimba wrote:I saw this on on some website and was asked to calculate if this was sufficient
(x^2)*(1-x^3) <0.

I recall the next entry was
x^2<x^5. How is this possible?

Thanks.
(x^2)*(1-x^3) <0

If we just multiply out the left side, we get:

(x^2)(1) - (x^2)(x^3) < 0

x^2 - x^5 < 0

and if we add x^5 to both sides, we get:

x^2 < x^5
Image

Stuart Kovinsky | Kaplan GMAT Faculty | Toronto

Kaplan Exclusive: The Official Test Day Experience | Ready to Take a Free Practice Test? | Kaplan/Beat the GMAT Member Discount
BTG100 for $100 off a full course
Top
Post new topic Post Reply
• Page 1 of 1