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

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Sum of series: 1+11+111+1111...n terms is equal to [#permalink] New post 11 Aug 2003, 21:57
Sum of series:
1+11+111+1111...n terms
is equal to?
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Re: Sum of series [#permalink] New post 11 Aug 2003, 22:35
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
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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, 22:35
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