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.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
23 Dec 2007, 21:35
Kudos
Bookmarks
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
0% (00:00) correct
0%
(00:00)
wrong
based on 0
sessions
History
Date
Time
Result
Not Attempted Yet
I simply dont get the answer which theres posted .its from a old thread
Solve for C
|C+3|C|+|C–1||=3
Solve for C
|C+3|C|+|C–1||=3
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 Problem Solving (PS) 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!
24 Dec 2007, 01:49
Kudos
Bookmarks
|C+3|C|+|C–1||=3
The crucial points are c=0 and c=1.
o If c =< 0 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(-C) + (-(c-1))| = 3 as -c >=0 and -(c-1) > 0 when c =< 0
<=> |-3*c + 1| = 3
<=> (-3*c + 1) = 3 as -3*c + 1 > 0 when c =< 0
<=> c = -2/3 ..... This value is possible as we work on c =< 0.
o If 0 < c =< 1 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(C) + (-(c-1))| = 3 as c >=0 and -(c-1) > 0 when 0 < c =< 1
<=> |3*c + 1| = 3
<=> 3*c + 1 = 3 as 3*c + 1 > 0 when 0 < c =< 1
<=> c = 2/3 ..... This value is possible as we work on 0 < c =< 1.
o If c > 1 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(C) + (c-1)| = 3 as c >=0 and (c-1) > 0 when c > 1
<=> |5*c - 1| = 3
<=> 5*c - 1 = 3 as 5*c - 1 > 0 when c > 1
<=> c = 4/5 ..... out because we work on c > 1
Finally, we have :
c = -2/3 or c = 2/3
The crucial points are c=0 and c=1.
o If c =< 0 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(-C) + (-(c-1))| = 3 as -c >=0 and -(c-1) > 0 when c =< 0
<=> |-3*c + 1| = 3
<=> (-3*c + 1) = 3 as -3*c + 1 > 0 when c =< 0
<=> c = -2/3 ..... This value is possible as we work on c =< 0.
o If 0 < c =< 1 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(C) + (-(c-1))| = 3 as c >=0 and -(c-1) > 0 when 0 < c =< 1
<=> |3*c + 1| = 3
<=> 3*c + 1 = 3 as 3*c + 1 > 0 when 0 < c =< 1
<=> c = 2/3 ..... This value is possible as we work on 0 < c =< 1.
o If c > 1 then
|C+3|C|+|C–1|| = 3
<=> |c + 3*(C) + (c-1)| = 3 as c >=0 and (c-1) > 0 when c > 1
<=> |5*c - 1| = 3
<=> 5*c - 1 = 3 as 5*c - 1 > 0 when c > 1
<=> c = 4/5 ..... out because we work on c > 1
Finally, we have :
c = -2/3 or c = 2/3
24 Dec 2007, 02:07
Kudos
Bookmarks
ashkrs
Cases which are possible
C>0 & C-1>0
C= 4/5 and -2/5
C>0 & C-1 <0
C=2/3 & -4/3
C<0 &C-1 <0 ( C-1 will be <0)
C=-2/3 & 4/3
There is not one value of C. Are there any other conditions given in your question?
... That question will not arrive like this on the GMAT. It's out of the GMAT scope 
