f : R → R is a function defined by f(x) = 10x - 7.
If g =f-¹, then g(x) =
| A. | |
| B. | |
| C. | |
| D. | |
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Option: C Explanation : Click on Discuss to view users comments. |
Assume R and S are (non empty) relations in a set A. Which of the following given relations is FALSE ?
| A. | If R and S are transitive, then R ∪ S is transitive |
| B. | If R and S are transitive, then R ∩ S is transitive |
| C. | If R and S are symmetric, then R ∪ S is symmetric |
| D. | If R and S are reflexive, then R ∪ S is reflexive |
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Option: A Explanation : Click on Discuss to view users comments. |
With respect to the relation 'x divides y', which of the following sets are totally ordered ?
I. {36, 3, 9}
II. {7, 77, 11}
III. {3,6, 24,12}
IV. {1, 2, 3,……}
| A. | I, II and III only |
| B. | II and III only |
| C. | I and III only |
| D. | All of these |
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Option: C Explanation : Click on Discuss to view users comments. |
To have inverse for the function f, f is
| A. | one one |
| B. | onto |
| C. | one one onto |
| D. | identity function |
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Option: B Explanation : Click on Discuss to view users comments. |
In a group of 72 students, 47 have background is Electronics, 59 have background in Mathematics and 42 have background in both the subjects. How many students do not have background in any of the, subjects ?
| A. | 8 |
| B. | 13 |
| C. | 25 |
| D. | 34 |
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Option: A Explanation : Click on Discuss to view users comments. |
