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Rudik [331]
3 years ago
8

Use set builder notation to describe these sets.

Computers and Technology
1 answer:
statuscvo [17]3 years ago
8 0

Answer:

a) S1 = { 2^x | x belongs to the set of Whole Numbers}

b) S2 = { 2+3(x-1) | x belongs to Natural Numbers }

c) S3 = { x^2 | x belongs to the set of Natural Numbers  }

d) S4 = { x | x belongs to English Alphabet }

e) S5 = { x | x is a <em>Vowel</em> of English Alphabet}

Explanation:

Whole Numbers = {0, 1, 2, 3, ...}

Natural Numbers = {1, 2, 3, ...}

English Alphabet={a, b, c, d, e, ... , x, y, z }

Vowels of English Alphabet = {a, e, i, o, u}

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n channels of bandwidth Bc are multiplexed together with FDM on a link. The guard band between two adjacent channels has bandwid
Andrei [34K]

Answer: The answer to the question is as follows:

Minimum BW= n*Bc + (n-1) Bg

Explanation:

FDM is a multiplexing technique that takes several baseband signals of n Khz wide (let's assume that all have the same bandwidth), and translates them in frequency so they can be transmitted together, at a higher frequency.

If we assume no guard bands between the different signals, the mimum bandwidth needed would be n times the bandwidth of a single signal.

In order to avoid crosstalk between signals, as the communication channel is not perfect, it usually leaves some room between any 2 signals, which it is called a band guard, and because there is a band guard for any 2 contiguous signals in the spectrum, the total number of bandguards (Bg) will be equal to (n-1) signals, so the total bandwidth to be used will be as follows:

BW needed: n*Bc + (n-1) Bg.

8 0
4 years ago
The email_list function receives a dictionary, which contains domain names as keys, and a list of users as values. Fill in the b
zysi [14]

Answer:

Following are the solution to this question:

Please find the attachment of this code.

Explanation:

In this code, an email_list method is declared, that accepts a domains parameter, and in the next step, an empty list and two for loop are defined, in which the first for loop is used for a count parameter value and in the second loop is use the append method to add the given value, and use the return method to print its value, and use the print method to call the "email_list" method.  

3 0
3 years ago
Privilege escalation is an​
olga55 [171]

Answer:

Privilege escalation is the act of exploiting a bug, design flaw or configuration oversight in an operating system or software application to gain elevated access to resources that are normally protected from an application or user.

Explanation:

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7 0
3 years ago
A is a way for students to keep track of information during research
Ilya [14]
The choices are a) credible website B)search log c) Boolean operator d) online database.

The answer is, d. Online database. There are already numerous online digital tools that can aid research. Examples are readcube, mendeley, google scholar. It helps you save and organize researches as well as automatically give bibliographies according to your need like APA and MLA. These tools can hold and save different information that researchers need.
6 0
3 years ago
Design a class named Person and its two subclasses named Student and Employee. Make Faculty and Staff subclasses of Employee. A
harina [27]

Answer:

se explaination

Explanation:

//Design a class named Person

public class Person

{

//A person has a name, address, phone number, and email address.

String name;

String address;

String phone;

String email;

//Constructor with arguments

public Person(String pname,String paddress,String phNum,String pemail)

{

name=pname;

address=paddress;

phone=phNum;

email=pemail;

}

// toString() method to return the name

public String toString()

{

return getClass().getName()+" "+name;

}

}

---------------------------------------------------------

//Student.java

public class Student extends Person

{

//A student has a class status

//(freshman,sophomore, junior, or senior).

//Define the status as a constant.

final int freshman =1;

final int sophomore =2;

final int junior=3;

final int senior=4;

String status="freshman";

//Constructor with arguments

public Student(String name, String address,String phonenumber, String email, int Status)

{

super(name,address,phonenumber,email);

if(Status == 1)

{

status = "freshman";

}

if(Status == 2)

{

status = "sophomore";

}

if(Status == 3)

{

status = "junior";

}

if(Status == 4)

{

status = "Senior";

}

status = "Student";

}

public String toString()

{

return super.toString() + " " + status;

}

}

------------------------------------------------------

//Employee.java

public class Employee extends Person

{

//An employee has an office, salary, and date hired.

String office;

double salary;

java.util.Date dateHired;

//Constructor with arguments

public Employee(String name,String address,String phonenumber,String email,String off,double sal)

{

super(name,address,phonenumber,email);

office=off;

salary=sal;

}

public String toString()

{

return (super.toString() + " " + office +" " + salary);

}

}

--------------------------------------------------------

//Faculty.java

public class Faculty extends Employee

{

//A faculty member has office hours and a rank.

String officeHours;

String rank;

//Constructor with arguments

public Faculty(String name,String address,String phonenumber,String email,String off,int salary,String offHours,String ranks)

{

super(name,address,phonenumber,email,off,salary);

officeHours=offHours;

rank=ranks;

}

public String toString()

{

return (super.toString() + " " + officeHours +" " + rank);

}

}

-----------------------------------------------------------------------------

//Staff.java

public class Staff extends Employee

{

//A staff member has a title

String title;

//Constructor with arguments

public Staff(String name,String address,String phonenumber,String email,String off,int salary,String ti t)

{

super(name,address,phonenumber,email,off,salary);

title=ti t;

}

public String toString()

{

return (super.toString() + " " + title);

}

}

3 0
4 years ago
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