Homework 2.1 for test 2
Choose the correct description of the set. A={5,10,15,20,...}
A={x | x ∈ N and x is a multiple of 5}
Write a description of the set. B={1, 2, 3, 4, 5, 6, 7}
B is the set of natural numbers less than or equal to 7
Write a description of the set. B={Spring, Summer, Fall, Winter}
B is the set of seasons
Express the set in roster form. B={x I XEN and > 8}
B={8,9,10,11,...}
Express the following set in set-builder notation. B={7,8,9,10,11,12,13,14}
B={x | x∈N and 7≤x≤14}
Express the given set in roster form. E={ X I XEN and 5 < x< 87}
E= {5,6,7,8,....,86}
Express the following set in set-builder notation. E is the set of odd integers.
E={ x I x is an integer and x is odd}
Determine whether sets A and B are equal, equivalent, both, or neither. A is the set of letters in the word 'deaf'. B is the set of letters in the word 'link'.
Equivalent
Determine whether the following set is finite or infinite. A= {3,8,13,18,.....}
Infinite
Determine whether the pair of sets is equal, equivalent, both, or neither. A={calculus, algebra, geometry} B={ algebra,literature, geometry, calculus}
Neither
Determine whether the pair of sets is equal, equivalent, both, or neither. A={history, chemistry, computer science} B={ chemistry, geometry, computer science, history}
Neither
Determine whether the following statement is true or false. {m}∈{t,z,p,m,v}
No
Determine whether the statement is true or false. 3E{x I xen and x is odd}
True
Determine whether the following statement is true or false. t∈ {t,q,h,c,s}
Yes
Determine whether the set is finite or infinite {24,32,40,....., 56}
finite
Determine whether the set is finite or infinite. The set of odd numbers greater than 23
infinite
For the set A= {4, 6},determine n(A).
n(A)=2
For the set D= {6, 8, 10, 12, 15, 20}, determine n(D).
n(D)=6
Determine if the set is well defined or not well defined. The set of the five best U.S. vice presidents
not well defined.
Determine if the set is well defined or not well defined. The set of U.S. airports
well defined
Determine whether the set is well defined. The set of current NFL players
well defined
Express the set in roster form. The set of natural numbers between 19 and 156
{20,21,22,23,...,155}
Use roster form to write the elements of the following set, or state that the set has no elements. The seasons
{Spring,summer,fall,winter}
Express the set in roster form. The set of continents whose name begins with the letter L
∅
