SOLUTION: Find the sum of all the integers from 1 to 1000

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Question 994678: Find the sum of all the integers from 1 to 1000
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The formula is (n)(n+1)/2=1000*(1001)/2=500(1001)=500,500
You can take the average of the top and bottom, which is (1+1000)/2=500.5, and multiply that by the number, 1000, to get the same result.