SOLUTION: Find the sum of all the integers from 1000 to3500 inclusive. please I need the work urgently.

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Question 912167: Find the sum of all the integers from 1000 to3500 inclusive.
please I need the work urgently.
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
S = 1000 + 1001 + ... + 3500
S = 3500 + 3499 + ... + 1000
2S = 4500 + 4500 + ... + 4500 = 4500(2501)
S = 2250*2501