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Define an empty set....

Define an empty set.

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Knowledge Check

  • Define ** on the set of real number by a ** b = 1 + ab . Then the operation ** is

    A
    commutative but not associative
    B
    neither commutative nor associative
    C
    associative but not commutative
    D
    both commutative and associative.
  • Define ** on the set of real number by a** b=1 + ab . Then the operation * is

    A
    commutative but not associative
    B
    associative but not commutative
    C
    neither commutative nor associative .
    D
    both commutative and associative .
  • If A and B are disjoint non-empty sets, then A-(A-B) equals :

    A
    A
    B
    B
    C
    `phi`
    D
    `A uu B`
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