Set Theory and Algebra MCQ - Sets

111:

If f(x) and g(x) are defined on domains A, B respectively, then domain of f(x) + g(x) is

 A. A ∪ B B. A ∩ B C. A Δ B D. A - B Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
112:

The function f : R - {2} → R defined by f(x) = (x2 + 2x)/(x -2) is

 A. one-one and onto B. one-one but not onto C. neither one-one nor onto D. not one one but onto Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
113:

If set S ={x I x is a student in your class} and relation x Ry ↔ x sits in the same row as y, then which of the following statements about R is TRUE?

 A. Reflexive only B. Transitive only C. Refleixve, transitvie and asymmetric D. Reflexive, transitive and symmetric Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here:
114:

If set A has 3 elements and set B has 4 elements, then number of injections that can be deined from A into B is

 A. 144 B. 12 C. 24 D. 64 Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
115:

Number ofbijective functions from set A to itself when A contains 106 elements, is

 A. 106 B. 1062 C. 106 ! D. 2106 Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here: