InterviewSolution
Saved Bookmarks
| 1. |
Which of the following are examples of the null set? D = {x : x ϵ N, x2 + 1 = 0}. |
|
Answer» Natural numbers = 1, 2, 3, 4, 5, 6,… If x = 1, then x2 + 1 = (1)2 + 1 = 1 + 1 = 2 ≠ 0 ∴ no elements in the set B because the equation 2x + 3 = 4 is not satisfied by any natural number of x. ∴ It is a null set. |
|