Arithmetic progression
Find any term of a sequence with a constant difference.
Inputs
Use the units shown—
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Formula & explanation
aₙ = a + (n − 1)d
Variables & units
- First term
- Numeric value · minimum -1000000000, maximum 1000000000
- Common difference
- Numeric value · minimum -1000000000, maximum 1000000000
- Term number
- Numeric value · minimum 1, maximum 1000000
Worked example
3, 7, 11, … has its 10th term at 39.
Assumptions
The first term is n = 1, so use n − 1 differences.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
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