Discrete Mathematics MCQs | Page - 3

Q. 21) By mathematical Induction 2n> n3

Q. 22) The symmetric difference A ⊕ B is the set

Q. 23) If A is the set of students who play crocket, B is the set of students who play football then the set of students who play either football or cricket, but not both, can be symbolically depicted as the set

Q. 24) Let A and B be two sets in the same universal set. Then A – B =

Q. 25) The number of subsets of a set containing n elements is

Q. 26) R is a relation defined in Z by aRb if and only if ab ³ 0, then R is

Q. 27) Let a relation R in the set R of real numbers be defined as (a, b) Î R if and only if 1 + ab > 0 for all a, bÎR. The relation R is

Q. 28) If R be relation ‘<‘ from A = {1, 2, 3, 4} to B = {1, 3, 5} ie, (a, b) Î R iff a < b, then RoR– 1 is

Q. 29) R is a relation from {11, 12, 13} to {8, 10, 12} defined by y = x – 3. The relation R – 1 is

Q. 30) R is a relation on N given by N = {(x, y): 4x + 3y = 20}. Which of the following belongs to R?