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PS sequence GMAT prep

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Manager
Manager
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Joined: 19 Oct 2008
Posts: 96
Followers: 1

Kudos [?]: 6 [0], given: 0

PS sequence GMAT prep [#permalink] New post 20 Mar 2009, 09:56
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
2+2+2^2+2^3+2^4+2^5+2^6+2^7+2^8=

1. 2^9
2.2^10
3.2^13
4.2^17
5.2^20

Can you please tell me the quickest way to solve this?
Current Student
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Joined: 28 Dec 2004
Posts: 3399
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 13

Kudos [?]: 173 [0], given: 2

Re: PS sequence GMAT prep [#permalink] New post 20 Mar 2009, 10:34
i get 2^9

u need to realized that 2^2+2^2=2^3

2^3+2^3=2^4

and so on..
Manager
Manager
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Joined: 19 Oct 2008
Posts: 96
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Kudos [?]: 6 [0], given: 0

Re: PS sequence GMAT prep [#permalink] New post 20 Mar 2009, 11:49
Thanks, OA is indeed A.
Senior Manager
Senior Manager
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Joined: 16 Jan 2009
Posts: 362
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 3

Kudos [?]: 74 [0], given: 16

Re: PS sequence GMAT prep [#permalink] New post 20 Mar 2009, 12:07
Can we genralise this for 2 atleast?
2^x+2^x= 2^(x+1)

but its not tru for any other number.
_________________

Lahoosaher

Re: PS sequence GMAT prep   [#permalink] 20 Mar 2009, 12:07
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