Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 25 Oct 2016, 07:25

# Today:

Live Q&A: UCLA Adcom at 8AM PDT in Chat1 | LBS/INSEAD at 9AM in Chat1 | Expecting Interview Invites from Ross: Join Chat2 for live updates

### 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

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a

Author Message
TAGS:

### Hide Tags

Manager
Joined: 29 Nov 2011
Posts: 81
Followers: 1

Kudos [?]: 263 [0], given: 37

The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a [#permalink]

### Show Tags

31 Jul 2012, 05:14
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (00:00) wrong based on 4 sessions

### HideShow timer Statistics

The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ an−1) can be

(A) n
(B) n²
(C) n² − 1
(D) n² − n
(E) none of these
Kaplan GMAT Instructor
Joined: 25 Aug 2009
Posts: 644
Location: Cambridge, MA
Followers: 82

Kudos [?]: 265 [0], given: 2

Re: The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a [#permalink]

### Show Tags

31 Jul 2012, 12:41
Hi Smita,

This is labeled as Source:Kaplan, but can you specify the source? Also, can you clarify whether there are supposed to be any subscript notations in this problem? This looks like it might be a sequences problem, but the formatting may have gotten lost in the translation to a message board.

Thanks!
_________________

Eli Meyer
Kaplan Teacher
http://www.kaptest.com/GMAT

Prepare with Kaplan and save $150 on a course! Kaplan Reviews Manager Joined: 29 Nov 2011 Posts: 81 Followers: 1 Kudos [?]: 263 [0], given: 37 Re: The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a [#permalink] ### Show Tags 31 Jul 2012, 23:10 KapTeacherEli wrote: Hi Smita, This is labeled as Source:Kaplan, but can you specify the source? Also, can you clarify whether there are supposed to be any subscript notations in this problem? This looks like it might be a sequences problem, but the formatting may have gotten lost in the translation to a message board. Thanks! Sir, here in a1, a2, .... , an, 1, 2, 3, ..., n are all subscripts. I hope that helps. Kaplan GMAT Instructor Joined: 25 Aug 2009 Posts: 644 Location: Cambridge, MA Followers: 82 Kudos [?]: 265 [0], given: 2 Re: The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a [#permalink] ### Show Tags 31 Jul 2012, 23:22 Smita04 wrote: KapTeacherEli wrote: Hi Smita, This is labeled as Source:Kaplan, but can you specify the source? Also, can you clarify whether there are supposed to be any subscript notations in this problem? This looks like it might be a sequences problem, but the formatting may have gotten lost in the translation to a message board. Thanks! Sir, here in a1, a2, .... , an, 1, 2, 3, ..., n are all subscripts. I hope that helps. Unfortunately, it doesn't. A letter with a subscript indicates a Sequence problem. However, Sequence questions on the GMAT will always give you information about the relevant sequence--it's like trying guess what 5&&6 means on a symbolism problem without the part of the problem defining &&. Something is missing from this problem, and without it, it's not solvable--sorry! _________________ Eli Meyer Kaplan Teacher http://www.kaptest.com/GMAT Prepare with Kaplan and save$150 on a course!

Kaplan Reviews

Re: The value of (a1 + a2 + a3 +… + an)(a1−1 + a2−1 + a3−1 +…+ a   [#permalink] 31 Jul 2012, 23:22
Similar topics Replies Last post
Similar
Topics:
21 A sequence of numbers a1, a2, a3,…. is defined as follows: a1 = 3, a2 5 15 Jun 2016, 01:46
12 If (a +1/a)^2=3, find the value of a^3 + 1/a^3 4 12 Nov 2015, 14:50
5 In the sequence a1, a2, a3, an, an is determined for all values n > 2 7 07 Apr 2015, 06:27
13 The sequence of numbers a1, a2, a3, ..., an is defined by an 5 09 Jun 2013, 05:31
14 The sequence a1, a2, a3, ... ,an, ... is such that an = an-1 14 14 Jun 2012, 02:38
Display posts from previous: Sort by