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17 February, 12:32

The sum of the first natural number and 0 is 1, the sum of the first two natural numbers and 0 is 3, the sum of the first three natural numbers and 0 is 6, and the sum of the first four natural numbers and 0 is 10. Which explicit formula generates the sum of the first n natural numbers and 0?

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  1. 17 February, 16:15
    0
    The sum of the first n natural numbers and 0=

    n * (n+1) / 2
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