Please check the question after you have posted it.varun289 wrote:If (information missing) and (information missing), then which of the following must be true for all values of a ?
a>= -6 or a=<5 ?? or none
If and , then which of the following must be true for all va
This topic has expert replies
Source: Beat The GMAT — Problem Solving |
GMAT/MBA Expert
-
Anju@Gurome
- GMAT Instructor
- Posts: 511
- Joined: Wed Aug 11, 2010 9:47 am
- Location: Delhi, India
- Thanked: 344 times
- Followed by:86 members
Anju Agarwal
Quant Expert, Gurome
Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.
§ GMAT with Gurome § Admissions with Gurome § Career Advising with Gurome §
Quant Expert, Gurome
Backup Methods : General guide on plugging, estimation etc.
Wavy Curve Method : Solving complex inequalities in a matter of seconds.
§ GMAT with Gurome § Admissions with Gurome § Career Advising with Gurome §
GMAT/MBA Expert
-
Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770
So, -5 < a < 6varun289 wrote:If a=<6 and a>= -5 , then which of the following must be true for all values of a ?
answer - a>=5 or a=> -6 ??
In other words, a can have any value from -5 to 6 inclusive.
Presumably, one answer choice is: a > 5
This need not be true since a could be less than 5
ELIMINATE this answer choice.
Presumably, another answer choice is: a > -6
Yes, this MUST be true.
If a can have any value from -5 to 6 inclusive, then a MUST be greater than or equal to -6
This is the correct answer choice.
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
