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August 4, 2015

Homework Help: algebra

Posted by Jill on Sunday, December 20, 2009 at 5:15pm.

Suppose the singers true love gave presents for n days instead of 12 days what would the toatl number of gifts given on the nth day be?she told us that the sum of consecutive integers from 1 to n is n(n+1) over 2
Someone told me n= 12 and the sum is = to 78. Why?

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