Discrete Maths - Sets
97. If A = {x I -1 < x < 1} = B, then function f(x) = x/2 from A to B is
- Option : A
- Explanation :
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98. A ∪ B is NOT equivalent to
- Option : D
- Explanation :
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99. How many students know at least two languages?
- Option : D
- Explanation :
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100. Let A = {1, 2, 3, 4} and B = {0, 1, -1, 2} and several sets of ordered pairs be specified as :
I. {(1, 0), (2, 1), (3, -1), (4, 2)}
II. {(1, 0), (2, -1), (3, 2)}
III. {(4, 1), (3, 2), (2, 3), (1, 4)}
IV. {(2, 1), (3, 0), (1, - 1), (3, 1), (4, 2)}
V. {(2, 0), (1, -1), (3, 2) (4, 1)}
Which of the sets of ordered pairs are graphs of a function from A → B ?
- Option : C
- Explanation :
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