Discrete Mathematics MCQs | Page - 15

Q. 141) Let p denote the statement: “I finish my homework before dinner”, q: “It rains” and r: “I will go for a walk”, the representative of the following statement: if I finish my homework before dinner and it does not rain, then I will go for walk is

Q. 142) The contrapositive of p →q is

Q. 143) Which of the following is declarative statement?

Q. 144) Which of the proposition is p ^ (~p v q) is

Q. 145) The relation R defined in A = {1, 2, 3} by aRb, if
a2 – b2
£ 5. Which of the following is false?

Q. 146) The relation R defined on the set A = {1, 2, 3, 4, 5} by R = {(x, y) :
x2 – y2
< 16} is given by

Q. 147) If R = {x, y) : x, y Î Z, x2 + y2 £ 4} is a relation in z, then domain of R is

Q. 148) If A = { (1, 2, 3}, then the relation R = {(2, 3)} in A is

Q. 149) Let X be a family of sets and R be a relation in X, defined by ‘A is disjoint from B’. Then, R is

Q. 150) (p → r) ∨ (q → r) is logically equivalent to