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Which of the following sets are null set...

Which of the following sets are null sets?
A=(`n:n in N` and `n lt 4` and `n gt 7`},

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The correct Answer is:
`A=phi`
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CALCUTTA BOOK HOUSE-SET THEORY-EXERCISE-1
  1. Which of the following sets are null sets? A=(n:n in N and n lt 4 an...

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  2. State which of the following are sets and which are not: A=A group o...

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  3. State which of the following are sets and which are not: B=A group o...

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  4. State which of the following are sets and which are not: C=A group o...

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  5. State which of the following are sets and which are not: D=A group o...

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  6. Express the following sets in Roster method, X= set of prime number...

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  7. Express the following sets in Roster method, Y={y:y in N and 1 le y...

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  8. Express the following sets in Roster method, P={x:x in R and x^2-5x...

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  9. Express the following sets in Roster method, Q={z:z is a letter of ...

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  10. Express the following sets in set-builder method: A=set of different...

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  11. Express the following sets in set-builder method: B={0,1/2,2/3,3/4,4...

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  12. Write whether the set is finite or infinite: C=set of all real numbers...

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  13. Express the following sets in set-builder method: D={4,8,12,16,20,……...

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  14. Express the following statements by set symbols, x is an element of ...

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  15. Express the following statements by set symbols, y is not an element...

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  16. Express the following statements by set symbols, A is a proper subse...

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  17. Express the following statements by set symbols, P is a super set of...

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  18. Express the following statements by set symbols, C is not a subset o...

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  19. Express the following statements by set symbols, The set S consists ...

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  20. Which of the sets of the following sets are null sets? Give reasons in...

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  21. Which of the sets of the following sets are null sets? Give reasons in...

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