Arithmetic & Geometric Sequence Calculator
nth term and sum of a sequence.
Inputs
- Type
- First term
- Common difference or ratio
- Number of terms (n)
How it is calculated
AP: aₙ = a + (n−1)d, S = n/2 (2a + (n−1)d). GP: aₙ = a·rⁿ⁻¹, S = a(rⁿ − 1) ÷ (r − 1).