---
ch-2:
  - function: linearrecurrencesecondorder
    arguments:
      - 1
      - 1
      - 2
      - 3
      - 5
    result: true
  - arguments:
      - 4
      - 2
      - 4
      - 5
      - 7
    result: false
  - arguments:
      - 4
      - 1
      - 2
      - -3
      - 8
    result: true