Thread: Research Cost
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Old June 12th, 2007, 01:53 AM

atul atul is offline
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Default Re: Research Cost
L_P, you're probably thinking about arithmetic series.

And Wikipedia attributes your story to Carl F. Gauss.

Oh, and when you count n for real (n = (-1+sqrt(1+4*90))/2) it's 9. Without decimals.
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