AP Precalc Arithmetic and Geometric Sequences Formulas

Front

Geometric Sequence

(when you know a₀)

Back

a_n = a₀rⁿ

Front

Geometric Sequence

(when you don't know a₀)

Back

a_n = a_kr^n-k

Front

Arithmetic Sequence

(when you know a₀)

Back

a_n = a₀ + dn

Front

Arithmetic Sequence

(when you don't know a₀)

Back

a_n = a_k + d(n - k)