Find the sum of the first n terms of a geometric sequence using S_n = a₁(1 - r^n) / (1 - r). Works for any valid common ratio.
Find the sum of the first n terms of a geometric sequence using S_n = a₁(1 - r^n) / (1 - r). Works for any valid common ratio.
The first term of the geometric sequence.
The constant multiplier between consecutive terms (r ≠ 1).
How many terms to sum.
The sum of the first n terms equals the first term times (1 minus r to the nth power) divided by (1 minus r).
How this calculator works
The sum of the first n terms equals the first term times (1 minus r to the nth power) divided by (1 minus r).
Common questions about this calculator
