MTH202 Grand Quiz Spring 2021 by Vu Assassin's

1. Range of function /[f(x)=(e^x)/] is ___________ · 2. Composite relation symbolically written as _______ · So R={(a,c)aeA, ceC, 3eB, (a,b)eR and (b,c)eS}

Q3. If x=17(mod 5) which of the following integers are valid solution for x ?

4. Range of the relation {(0,1),(3,22),(90,34)}

{1,22,34}

Q5. Let A= {0,1,2} and R = {(0,2),(1,1),(2,0)} be a relation on A. The which of the following ordered pairs are needed to make it transitive?

(0,0) and (2,2)

6. Operation of subtraction is a binary operation on the set of __________

Integers

7. Let S=R and define the ‘square’ relation R= {(x,y)Ix2=y2}. The square relation is an _________ relation

Equivalence relation

8. The logic gate NOT is a uniary operation on {0,1}.

True · 9. Let A= {1,2}, then P(A)=__________ · {{},{1},{2},{1,2}}

10. If a relation R is reflexive, anti symmetric and transitive then which of the following is not true for the inverse relation.

Inverse relation will be irreflexive.

11. Let R be a binary relation on a set A,R is anti-symmetric iff ___________

a,beA if (a,b)eR and (b,a)eR then a=b

12. “-“ is a binary operation on the set of integers Z.

True

13. The inverse relation R^(-1) from B to A is defined as ____________

R^(-1) = {(b,a) e B*A I (a,b)eR}

Q14. Which of the following is always true for the matrix representation of a symmetric relation?

Matrix is equal to its transpose

15. Let A= {1,2,3,4} and let R and S be transitive binary relations on A defined as; R= {(1,2), (1,3), (2,2), (3,3), (4,2), (4,3) and S={(2,1), (2,4), (3,3)} then RuS= {(1,2), (1,3), (2,1), (2,2), (2,4), (3,3), (4,2), (4,3)}

R union S is transitive

16. Let S=R and define the ‘ square’ relation R = {(x,y)Ix2=y2}. The square is an _________ relation.

Equivalance relation

Q17. If x=-10(mod 15). Which of the following integers are valid solution for x?

18. Let R be a binary relation on a set A. If R is anti symmetric then

Inverse of R is anti symmetric

19. If A={1,2,3} is a set and R = {(1,2),(2,2),(2,1)} is a relation on A, R is

Symmetric

20. Let A={0,1} and B=(1). Let R and S be two binary relations on Cartesian product of A and B such that R={(0,1)} and S= {(1,1)}. Then R intersection S=_________________

Empty

21. A relation R is said to be ______ iff it is reflexive, antisymmetric and transitive.

Q22. Let X={1,2,3} and Y={7,8,9} and let f be function defined from X to Y such that f is onto then which of the following statement about f is true?

Co-domain of f must contain 1 element · 23. The function fog and gof are always equal · False

24. If a relation R={(1,2),(2,3),(3,4)(4,1)(2,2) is given then which of the following is

R is reflexive

25. A set is called countable if , and only if, it is____________

finite

26. Let f(x) = x2-1 define function f from R to R and c=2 be any scalar, then c,f(x) is __________

2x2+2 · 27. The set Z of all integers is ___________ · Countable