Math
Geometric Sequence Calculator
nth term and sum of the first n terms of a geometric sequence.
Free to use — no sign-up or login.
aₙ
Sₙ
Amortization schedule
| # | Date | Payment | Principal | Extra | Interest | Balance |
|---|---|---|---|---|---|---|
This free Geometric Sequence Calculator covers nth term and sum of the first n terms of a geometric sequence.
a_n = a1 r^{n−1}; finite sum uses (1−r^n)/(1−r) when r ≠ 1. Related math tools sit beside How it works, with no account required.
Using the Geometric Sequence Calculator
nth term and sum of the first n terms of a geometric sequence. Typical inputs are First term a₁, Ratio r and n. How it works beside the form states the identity the Geometric Sequence Calculator applies.
FAQ
How do I use the Geometric Sequence Calculator?
Open the Geometric Sequence Calculator, fill First term a₁, Ratio r and n, and read the result. a_n = a1 r^{n−1}; finite sum uses (1−r^n)/(1−r) when r ≠ 1.
What formula does the Geometric Sequence Calculator use?
The Geometric Sequence Calculator uses the identity in How it works. In words: a_n = a1 r^{n−1}; finite sum uses (1−r^n)/(1−r) when r ≠ 1.