How to find the sum of a sequence

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Sum of the first n terms of an arithmetic sequence

})}, where Sn{sum the n-first multiples of a number. . If instead of starting at 1 and going from 1 to 1 we want to calculate the sum of the n-
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SUM.SERIES (function SUMA.SERIES)

The formula that serves us to calculate the value of the sum of the sum of the terms of an arithmetic progression is equal: To the sum of the first and last terms,

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1+2+3+4+5++100

Plot the formula for finding the sum of an arithmetic sequence. The formula is Sn=n(a1+an2){displaystyle S_{n}=n({frac {a_{1}+a_{n}}

NUMERICAL SERIES (Finding the sum)

Note how the formula states that the sum of an arithmetic sequence is equal to the average between the first and last term, multiplied by the number of

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