Geometric progression (nth term)


A geometric progression, also known as a geometric sequence, is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio. The n-th term of a geometric sequence can be calculated by the initial value and common ratio of the progression.

Related formulas


anNth term of the sequence (dimensionless)
aFirst term (dimensionless)
rCommon ratio (dimensionless)
nNumber of terms (dimensionless)