Question

Sequence, series, progression formula

Answer 1

Answer:

The length of a sequence is equal to the number of terms and it can be either finite or infinite.

Sequence and Series Formulas.

Arithmetic Progression

Sum of first n terms sn = n/2(2a + (n-1)d)

Geometric Progression

sn = a(1 – rn)/(1 – r) if r < 1 sn = a(rn -1)/(r – 1) if r > 1