Mathematical expression and sentences

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Across
  1. 3. a special case of relation where no to ordered pairs can have the same first element
  2. 5. a well-defined collection of objects (elements)
  3. 11. contains the elements found in both set A and B
  4. 13. the range of the function is positive plus the set of 0
  5. 14. a set with no elements
  6. 16. the subset of the Cartesian product which contain only some of the ordered pair based on the relationship defined between the first and second element
  7. 17. set with definite set and accountable number of elements
  8. 18. accepted rules and practice of spelling, writing and punctuation
  9. 20. a set with exactly one elements
  10. 22. type of function where both g(x) and h(x) are polynomials and h(x)≠0
  11. 24. contains the elements found in set A or in set B, or in both
  12. 25. both range and domain of the function is the same
  13. 26. the range of the function is constant
  14. 27. any operation that combines two values to create a new one
  15. 28. one to one function
  16. 29. the set of all first elements of R
Down
  1. 1. symbol use in counting
  2. 2. indefinite or non-countable number of elements
  3. 4. expression written differently but their values are the same when simplified
  4. 6. range of f is {-1,0,1}
  5. 7. the range is pure integer value
  6. 8. difference of a set from the universal set
  7. 9. polynomial for every value of x
  8. 10. always represent by U
  9. 12. the set of all second element of R
  10. 15. onto function
  11. 19. usually represents the possible values for quantities
  12. 21. usually represents constant in formulas in mathematics, physics, chemistry, and other related branches
  13. 23. one to one and onto function