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Sum of series: 1+11+111+1111...n terms is equal to

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Intern
Joined: 01 Aug 2003
Posts: 48
Location: Mumbai
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Sum of series: 1+11+111+1111...n terms is equal to [#permalink]  11 Aug 2003, 20:57
Sum of series:
1+11+111+1111...n terms
is equal to?
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 13

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Re: Sum of series [#permalink]  11 Aug 2003, 21:35
mistdew wrote:
Sum of series:
1+11+111+1111...n terms
is equal to?

I don't think this is a fair GMAT question, but I believe the answer is:

(10(10^n - 1)/9 - n)/9
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Re: Sum of series   [#permalink] 11 Aug 2003, 21:35
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Sum of series: 1+11+111+1111...n terms is equal to

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