puzzle

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Across
  1. 2. The average of a set of numbers
  2. 6. A pattern to describe an object
  3. 8. A test that states whats in a series
  4. 11. A triangle of numbers where 2 numbers above added together make the number below it
  5. 13. A symbol to express the sum of variables
  6. 16. A sequence where a term is multiplied by the same number to get the next term
  7. 19. Where the index is equal to the lower bound of the summation
  8. 20. The ratio between 2 numbers in a geometric series
Down
  1. 1. A test to compare a series
  2. 3. A certain order things fall into
  3. 4. The average of terms added together then dividing by the number of terms
  4. 5. The difference between 2 numbers in an arithmetic sequence
  5. 7. The technique to prove all natural numbers
  6. 9. A sequence that does not have a limit
  7. 10. A series that goes on forever
  8. 12. A formula to define the next term
  9. 14. A single unit used to describe something
  10. 15. The relationship between terms in a series
  11. 17. A series of numbers where the ratio is constant
  12. 18. A certain amount of something that has an end or stop