MATHS

# Progression

## Basic theoretical information

### Arithmetic progression

Formula *nth* member arithmetic progression:

The ratio between the three neighboring members of the arithmetic progression:

The formula for the sum of an arithmetic progression:

The property of arithmetic progression:

### Geometric progression

Formulas of the *nth* member of a geometric progression:

The ratio between the three neighboring members of the geometric progression:

The formula for the sum of a geometric progression:

The formula for the sum of an infinitely decreasing geometric progression:

Geometric progression property: