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12-05-2020
Mathematics

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Find the sum of all the even integers from 12 to 1980

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12-05-2020

Answer:

1961124

Step-by-step explanation:

The sum of consecutive positive integers from n1 to n2 is equal to:

n₁ + (n₁ + 1) + ... + n₂ = n₂(n₂ + 1) / 2 - n₁(n₁ - 1) / 2

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