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If A= {1,2,3,4,5,6,7} and B= {7,8,9,10},...

If A= {1,2,3,4,5,6,7} and B= {7,8,9,10}, then A-B equals :

A

{7, 9}

B

{3, 4,8,10}

C

{7}

D

None of these.

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MODERN PUBLICATION-RELATIONS AND FUNCTIONS -EXERCISE
  1. A function 'f' is defined by f(x) = 2x - 5, find : f(-3).

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  2. If U ={1,2, 3, 4,5, 6,7,8, 9,10} and A= {3, 4, 7, 9}, then A’ equals :

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  3. If A= {1,2,3,4,5,6,7} and B= {7,8,9,10}, then A-B equals :

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  4. If A= {1, 2,3, 4,5, 6,7} and B= {3,5,7,9,11}, then A nn B equals :

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  5. Which of the following are sets ? Justify your answer. A collection of...

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  6. Set of even prime number is a

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  7. A collection of most dangerous animals of the word is :

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  8. Let f(x) = [x], then f(-(3)/(2)) is equal to :

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  9. Let f (x) = |x|, then f(-5/2) is :

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  10. Let f(x)=(|x|)/(x), then f(-3) equals :

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  11. State whether each of the following set is finite or infinite: The set...

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  12. State whether each of the following set is finite or infinite: The set...

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  13. The set of circles passing through (0, 0) is :

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  14. The number of subsets of the set {a, b} is :

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  15. The number of subsets of the set {1, 2, 3} is:

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  16. The number of subsets of the set (a, e, i, o, u} is:

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  17. If (x + 1, y - 2) = (3, 1), the value of :

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  18. If (x/3+1, y-2/3)=(5/3, 1/3), find the values of x and y.

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  19. State whether the following statement is true or false. If the stateme...

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  20. The set {x:x is a prime number and divisor of 6} is equal to:

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