midterm Quiz no. 2

1. 1. if g(x) = 2x + 1

what is g(3) ?

• 6

• 7

• 3

• 8

2. 2.       It is a set of ordered pairs of real numbers (𝑥,𝑦) such that to each element x of the set X there corresponds at least one element of the set Y.

• function

• relation

• domain

• range

3. 3.          It is the set of all first components of the ordered pairs.

• function

• relation

• domain

• range

4. 4.   What does the union of two sets represent?

• A.   Elements common to both sets              

• All elements in both sets         

• A.   Elements only in the first set

• none of the above

5. 5.     The intersection of sets A and B contains:

• All elements in set A                               

• Common element in sets A and B

• All elements in set B                             

• No elements

6.   If set A = {1, 2, 3} and set B = {3, 4, 5}, what is A∪B?

• {1, 2, 3, 4, 5}             

•          {1, 2, 3}            

•        {3}                  

• {4, 5}

7. 7.   If set A = {1, 2, 3} and set B = {2, 3, 4}, what is A∩B?

• {1}                                    

•                 {2, 3}                

•                                         {2}  

• {3}

8.   If the universal set U={1,2,3,4,5} and A={1,2}, what is A′ ?

•  {1,2}                          

   

•                         {3,4,5}              

   

•               {2,3,4}              

   

•           {3}

   

9. 9. What is the logical operator for "AND"?

• negation

• conjunction

• disjunction

• implication

10. 10. Which of the following represents the logical operator for "OR"?

• negation

• conjunction

• disjunction

• implication