panpsychism/morning_exercise_resources/used/arithmetic_geometric/arithmetic_geometric.md

Arithmetic or Geometric sequence?

Write a method arith_geo that takes an array of numbers and returns the string "Arithmetic" if the sequence in the array follows an arithmetic pattern, or returns "Geometric" if it follows a geometric pattern. If the sequence doesn't follow either pattern return -1.

An arithmetic sequence is one where the difference between each of the numbers is consistent, eg. the difference between each number is 5.

Whereas in a geometric sequence, each term after the first is multiplied by some constant or common ratio.

Arithmetic example: [2, 4, 6, 8]

Arithmetic example: [20, 28, 36, 44]

Geometric example: [2, 6, 18, 54]

Geometric example: [6, 12, 24, 48]