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SVP
Status: 2000 posts! I don't know whether I should feel great or sad about it! LOL
Joined: 04 Oct 2009
Posts: 1756
Location: Peru
Schools: Harvard, Stanford, Wharton, MIT & HKS (Government)
WE 1: Economic research
WE 2: Banking
WE 3: Government: Foreign Trade and SMEs
Followers: 50
Kudos [?]:
145
[0], given: 108
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Re: In the infinite sequence A, An = X^(n-1) + X^n + X^(n+1) + X [#permalink]
 27 Aug 2012, 18:30
+1 B Factorize and you will have solved a great part of the question 
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Intern
Joined: 03 Sep 2012
Posts: 3
Followers: 0
Kudos [?]:
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[0], given: 5
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Re: In the infinite sequence A, An = X^(n-1) + X^n + X^(n+1) + X [#permalink]
05 Sep 2012, 09:02
I did it like it : as you can see x(1+x(1+x(1+x(1+x)))) X comes 5 times, therefore the max term will be X^5, in the question you see that you want to arrive at X^5 so it means that in the sum of X^n-1...x^n+3 the max term must be X^10 so that it can be x^5(x^5) therefore 10 = 3+n, n=7, timer indicate me 1min 53.
But definitely i had the answer, but i was unable to demonstrate it in that time, it would take more like 5 to 10 minutes.
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Re: In the infinite sequence A, An = X^(n-1) + X^n + X^(n+1) + X
[#permalink]
05 Sep 2012, 09:02
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