Math

Arithmetic Sequence Solver

Find nth term and sum of an arithmetic progression from a, d, and n.

Arithmetic Sequence Solver computes nth term and partial sums from first term and common difference. It is useful for classwork, exam prep, and quick progression checks in spreadsheets or scripts. The tool avoids manual formula rearrangement errors. Use it to validate sequence calculations quickly.

Sequence Inputs

For arithmetic progression: a, d, n.

Results

Nth term: 21.000000

Sum of first n terms: 120.000000

Preview terms: 3.0, 5.0, 7.0, 9.0, 11.0, 13.0, 15.0, 17.0, 19.0, 21.0

How to use this tool

Enter first term, common difference, and term index or count.
Run the solver to compute term values and sums.
Cross-check results against your expected formula setup.

Sequence and algebra resources

Recommend algebra books, online lessons, and printable practice sets.

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