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Let A = { 1, 2, { 3, 4 }, 5 }. Which of...

Let `A = { 1, 2, { 3, 4 }, 5 }`. Which of the following statements are incorrect and why?
`1 ∈ A`

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NCERT BANGLISH-SETS-EXERCISE 1.3
  1. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  2. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  3. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  4. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  5. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  6. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  7. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  8. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  9. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  10. Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are ...

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  11. Write down all the subsets of the following sets {a}

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  12. Write down all the subsets of the following sets {a,b}

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  13. Write down all the subsets of the following sets {1,2,3}

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  14. Write down all the subsets of the following sets phi

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  15. How many elements has P(A), if A = φ?

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  16. Write the following as intervals : {x : x ∈ R, – 4 < x ≤ 6}

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  17. Write the following as intervals : {x : x ∈ R, – 12 < x < –10}

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  18. Write the following as intervals : {x : x ∈ R, 0 ≤ x < 7}

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  19. Write the following as intervals : {x : x ∈ R, 3 ≤ x ≤ 4}

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  20. Write the following intervals in set-builder form : (– 3, 0)

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