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A= {x : x in N, x^(2)+4=0} then,...

`A= {x : x in N, x^(2)+4=0}` then,

A

`A= {-2, 2}`

B

`A= {2}`

C

`A= phi`

D

`A= {phi}`

Text Solution

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The correct Answer is:
C
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KUMAR PRAKASHAN-SETS-TEXTBOOK BASED MCQs
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  2. If A sub B then A cap B = ..........

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  3. U= [-2,1], A= {x : x in N, x^(2)+x -2=0} then A'="……….".

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  4. Taking the set of natural number as universal set and A= {x : x -8 =3}...

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  5. If n(U)= 700, n(A)= 200, n(B)= 300, n(A cap B)= 100" then "n(A' cap...

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  6. If N(a)= {an : n in N}, then N(5) cap N(7)="………."

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  7. If aN= {ax : x in N}" then "3N cap 7N="………."

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  8. For set {(a, b) : 2a^(2)+3b^(2)= 35, a, b in Z} the number of its elem...

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  9. A and B are two sets (A - B) cup (B - A) cup (A cap B)="……….."

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  11. A= {x : x in N, x^(2)+4=0} then,

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  12. For interval (-1, 1) which of the following statements is true?

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  13. If A= {1, 3, 5, {2, 4}}" and "B= {2, 4} then,

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  14. Fill in the blanks to make each of the following a true statement : ...

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  15. Which of the following statements is false ?

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  16. A and B are mutually disjoint sets. Then n(A cup B)="…………."

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  17. Two finite sets have m and n elements. The number of elements in the p...

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  18. For two sets A and B, prove that A- (B cap C)= (A - B) cup (A - C).

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  19. 63% of the Americans like cheese where as 76% like apples. If x% of th...

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  20. For sets A and B, n(A - B)= 8+2x, n(B - A)= 6x" and "n(A cap B)= x. If...

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