BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Algebra

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Fri Aug 22, 2008 9:32 pm
Thanked: 1 times

Algebra

by treker » Fri Mar 12, 2010 9:07 pm
Let a, b, and c be negative integers. Is a^b - c^b < 0?

(1) b is an even integer.
(2) a < c

Pls explain your answers. Thanks
Top
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 232
Joined: Sun Feb 28, 2010 10:47 pm
Thanked: 10 times

by Phirozz » Sat Mar 13, 2010 12:00 am
treker wrote:Let a, b, and c be negative integers. Is a^b - c^b < 0?

(1) b is an even integer.
(2) a < c

Pls explain your answers. Thanks
It cannot be answered from 1 alone because we dont know the relation between a and c

It cannot be answerd from 2 alone because we dont know whether b is even or odd
eg -3^-1 > -2^-1 but -3^-2 < -2^-2

So by combining both it can be answered
Top
Post new topic Post Reply
• Page 1 of 1