Arithmetic series sum
Calculate the first n terms of an arithmetic series with negative differences, decimals, and precision control.
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First term
Result
First n terms
Enter parameters to calculate
: 0 · Decimal places: 0
What this tool does
- Sum arithmetic series
- Verify arithmetic formulas
Example
Input
1,2,5
Output
S5 = 25
Enter first term, difference, and term count.
Frequently asked questions
Can the difference be negative?
Yes.
Can terms be fractional?
No, it must be a positive integer.
Are decimal first terms supported?
Yes.
Keywords：等差数列求和arithmetic series