Answer: 2008. d(n) is number of divisors of n. I give number of divisors and list them also. The divisors of n = 2008: 1, 2, 4, 8, 251, 502, 1004, 2008 d(2008) = 8 The divisors of n = 2009: 1, 7, 41, 49, 287, 2009 d(2009) = 6
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1 + 2 + 3... + n = n (n + 1) ----------- 2 1 + 2 + 3... + 2008 = 2,017,036 (see below) 2008 (2008 + 1) -------------------------- 2 Just take the highest number (2008 in your case) and multiply it by itself plus one, so ...(2008 + 1), and divide the entire quantity by 2.
The sum of all the the integers between 1 and 2008 (2 through 2,007) is 2,017,036.
August 2008: 1 euro is 1.58 US dollars. 1 US dollar is 0.6329 euros.
Details is discussed on http://arjudba.blogspot.com/2008/04/what-are-difference-between-ddl-dml-and.html
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