GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Oct 2019, 20:41

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

The sequence a1, a2, , a n, is such that an = 2an-1 - x for

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Joined: 31 Dec 1969
Location: Russian Federation
Concentration: Entrepreneurship, International Business
WE: Supply Chain Management (Energy and Utilities)
The sequence a1, a2, , a n, is such that an = 2an-1 - x for  [#permalink]

Show Tags

New post 20 Oct 2004, 08:58
The sequence a1, a2, … , a n, … is such that an = 2an-1 - x for all positive integers n ≥ 2 and for certain number x. If a5 = 99 and a3 = 27, what is the value of x?

A. 3
B. 9
C. 18
D. 36
E. 45

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Senior Manager
Senior Manager
avatar
Joined: 19 May 2004
Posts: 271
  [#permalink]

Show Tags

New post 20 Oct 2004, 11:45
1
1
A.

a5=2*a4 - X => 99+X = 2*a4.

a4=2*a3 - X => (99+X)/2 =2*27 - X.

Solve and get X=3.
Manager
Manager
avatar
Joined: 09 Sep 2004
Posts: 135
  [#permalink]

Show Tags

New post 20 Oct 2004, 16:00
1
I agree with Dookie - A
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 13385
Re: The sequence a1, a2, , a n, is such that an = 2an-1 - x for  [#permalink]

Show Tags

New post 18 Sep 2018, 05:08
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: The sequence a1, a2, , a n, is such that an = 2an-1 - x for   [#permalink] 18 Sep 2018, 05:08
Display posts from previous: Sort by

The sequence a1, a2, , a n, is such that an = 2an-1 - x for

  post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Gladiator59






Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne