8.1 - 8.3 Pre-Calculus

Stupid Sigma Notation

Arithmetic Sequence

an = a0 + nd

Geometric Sequence

an = a1(r^n-1)

Arithmetic Finite Series (partial sum)

Sn = n/2(a1 + a2)

Geometric Finite Series (partial sum)

Sn = (a1(1 - r^n))/(1 - r)

Arithmetic Infinite Series

does not converge

Geometric Infinite Series (if |r| < 1)

S = a1/(1 - r)

Geometric Infinite Series (if |r| > 1)

Does not converge