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###### Roger Saanye
more than 3 weeks ago

# Derivation of sum?

Under calculus
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more than 3 weeks ago
The sum of a series of numbers can be derived using the formula for the sum of an arithmetic series or the sum of a geometric series.

1. Sum of an arithmetic series:
The sum of an arithmetic series can be found using the formula:
S = (n/2)(a + l)
where S is the sum of the series, n is the number of terms, a is the first term, and l is the last term.

2. Sum of a geometric series:
The sum of a geometric series can be found using the formula:
S = a(1 - r^n) / (1 - r)
where S is the sum of the series, a is the first term, r is the common ratio, and n is the number of terms.

These formulas can be derived using mathematical induction or other methods, but they are widely accepted and used to find the sum of series in mathematics.
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