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91. Which of the following is a partition of the set S = {l, 2, 3, 4, 5, 6} ?
[{(I, 3, 5), {2, 4}, {3, 6)]
[{I, 5}, {2}, {3, 6)]
[{(I, 5), {2}, {4}, {l, 5}, {3, 6)]
[{I, 2, 3, 4, 5, 6}]
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92. The domain and range are same for
constant function
identity function
absolute value function
greatest integer function
93. The number of functionsf : (1, 2, 3,......., n), → (1, 2,..........., m),which are one-to-one is
mn
m (m - 1) (m - 2) ..........(m - n + 1)
nm
n (n - 1) (n - 2)............(n - m + 1)
94. A ∪ B = A ∩ B if and only if
A is empty set
B is empty set
A and B are non-empty sets
A and B are empty sets
95. The function f : Z → Z given by f(x) = x2 is
one-one
onto
one-one and onto
None of these
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