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11 Oct 2015, 13:07
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
52% (02:11) correct
48%
(01:45)
wrong
based on 204
sessions
History
Date
Time
Result
Not Attempted Yet
S = x^3 +3^x. Is S > 0?
(1) x < 0
(2) |x| > 1
(1) x < 0
(2) |x| > 1
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
Posts: 2,315
Given Kudos: 816
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE:Engineering (Aerospace and Defense)
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Updated on: 17 Oct 2015, 03:49
Originally posted by ENGRTOMBA2018 on 11 Oct 2015, 15:38.
Last edited by ENGRTOMBA2018 on 17 Oct 2015, 03:49, edited 1 time in total.
Last edited by ENGRTOMBA2018 on 17 Oct 2015, 03:49, edited 1 time in total.
Corrected the typo
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MINDPOWER
\(S = X^3 +3^X\)
Per statement 1, x<0. If x=-0.5, then S>0 but if x=-1, then S<0. This statement is not sufficient.
Per statement 2, |x|>1 ---> x<-1 or x>1 . For x<-1 , S<0 but for x>1, S>0. Thus this statement is not sufficient.
Combining the 2 statements, you get x<-1 and for all the values of x satisfying x<-1 will give you a unique answer of S<0.
Thus C is the correct answer.
16 Oct 2015, 20:41
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Engr2012
Can you please elaborate on this line? From S1 we got x<0 and from S2 we got x>1 or x<-1 but I'm not sure how you combined both to get x<9?
