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 1612:00 PM EDT
-11:59 PM EDT
You’re first to know: Save $200 on GMAT prep starting tomorrow, 4/13. Get 6 official practice tests and study with real questions. Be ready to save!
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.
01 Jun 2020, 04:16
Kudos
Bookmarks
E
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:
47% (02:01) correct
53%
(02:18)
wrong
based on 268
sessions
History
Date
Time
Result
Not Attempted Yet
The sequence S consists of 10 terms: x, x^2, x3, ..., x^10, where x is a non-zero number. Is the sum of all the terms in the sequence greater than 0?
(1) The distance of any term of the sequence S from zero on the number line is not less than 1.
(2) x^5 = x^7
Are You Up For the Challenge: 700 Level Questions
(1) The distance of any term of the sequence S from zero on the number line is not less than 1.
(2) x^5 = x^7
Are You Up For the Challenge: 700 Level Questions
The sequence S consists of 10 terms: x, x^2, x3, ..., x^10, where x is a non-zero number. If P is the sum of all the terms in the sequence S, is P^3 > 0?
(1) The distance of any term of the sequence S from zero on the number line is not less than 1.
(2) x^5 = x^7
(1) The distance of any term of the sequence S from zero on the number line is not less than 1.
(2) x^5 = x^7
01 Jun 2020, 05:25
Kudos
Bookmarks
Statement 2 is only true if x is equal to -1, 0 or 1 (if x^7 = x^5, x can be zero, and if x is nonzero we can divide by x^5 on both sides to get x^2 = 1, which means x = -1 or x = 1, or you can factor: x^7 - x^5 = 0, so x^5(x^2 - 1) = 0, and (x^5)(x+1)(x-1) = 0, from which we get x = -1, 0 or 1). Since x is nonzero, Statement 2 ensures x = 1 or x = -1. If x = 1, each term in the sequence is 1, and the sum of the ten terms is 10. If x = -1, the sequence alternates: -1, 1, -1, 1, etc, and the sum of ten (or any other even number) of terms is zero. Since Statement 1 is true whether x = 1 or x = -1, the sum here might be 0 or 10 using both Statements, and the answer is E.
01 Jun 2020, 10:35
Kudos
Bookmarks
Statement A=> The distance of any term of the sequence S from zero on the number line is not less than 1.
x>= 1 or x<= -1
Now from first look evaluating won't be easy. Just put x = 1 and x =-1
You will find it insufficient to answer the question.
Jump to next
Statement B => x^5 = x^7
Now x is non zero, hence
x^2 = 1
x = 1 or -1
Again insufficient.
Hence E
x>= 1 or x<= -1
Now from first look evaluating won't be easy. Just put x = 1 and x =-1
You will find it insufficient to answer the question.
Jump to next
Statement B => x^5 = x^7
Now x is non zero, hence
x^2 = 1
x = 1 or -1
Again insufficient.
Hence E
