Arithmetic Sequence Calculator
Enter the first term, the common difference and the term number n to find any term of an arithmetic sequence instantly. The tool also calculates the sum of the first n terms and lists the sequence, showing the working for every result.
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How to use
- Enter the first term a.
- Enter the common difference d (the gap between terms).
- Enter n.
- The nth term, the sum of the first n terms and the sequence will be shown.
Note: If d is negative the sequence will decrease — the formula stays the same.
Frequently Asked Questions (FAQ)
What do I enter in this calculator?
The first term a, the common difference d which is the gap between terms, and the term number n.
What does the arithmetic sequence calculator show?
The nth term, the sum of the first n terms, and the sequence itself.
What happens if the common difference is negative?
The sequence decreases, and the formula stays the same.
What is an arithmetic sequence?
A list of numbers where each term differs from the previous one by the same fixed amount, like 3, 7, 11, 15 where the common difference is 4.