Solving First Order Differential Equations dsolve Symbolic solution of ordinary differential equations. dsolve will not accept equations as strings in a future release. Use symbolic expressions or sym objects instead. For example, use syms y(t); dsolve(diff(y)==y) instead of dsolve('Dy=y'). Example 1: Solve y'= y, y(0)-2 syms x y(x) dy(x) = diff(y); Y = dsolve (dy==y,y(0)==2); Example 2: Solved=x√1-² syms x y(x) dy(x) = diff(y); Y = dsolve (dy==x*sqrt(1-y^2)); Exercises: Solve the following differential equations 1. (1+x) y - xy = x+x² 2.+y=x, y(0)=4 3. d +ysecx cosSX

Solving First Order Differential Equations dsolve Symbolic solution of ordinary differential equations. dsolve will not accept equations as strings in a future release. Use symbolic expressions or sym objects instead. For example, use syms y(t); dsolve(diff(y)==y) instead of dsolve('Dy=y'). Example 1: Solve y'= y, y(0)-2 syms x y(x) dy(x) = diff(y); Y = dsolve (dy==y,y(0)==2); Example 2: Solved=x√1-² syms x y(x) dy(x) = diff(y); Y = dsolve (dy==x*sqrt(1-y^2)); Exercises: Solve the following differential equations 1. (1+x) y - xy = x+x² 2.+y=x, y(0)=4 3. d +ysecx cosSX

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Can you implement the Student class using the concepts of encapsulation? A solution is placed in the "solution" section to help you, but we would suggest you try to solve it on your own first. You are given a Student class in the editor. Your task is to add two fields: ● String name ● String rollNumber and provide getter/setters for these fields: ● getName ● setName ● getRollNumber ● setRollNumber Implement this class according to the rules of encapsulation. Input # Checking all fields and getters/setters Output # Expecting perfectly defined fields and getter/setters. There is no need to add constructors in this class.
An obvious continuation is to use random numbers to create namesfor the stars and planets. Instead of creating random strings of characters, names usually follow certain rules. Select a set of real-world names (e.g. from J.R.R. Tolkien’sworld) and invent a set of rules that they follow. Design and implement a methodthat creates new names based on the set of rules and random numbers.
In java create a method long-isogram: determine the longest isogram in the paragraph. An isogram is a word that has no repeating letters.(Differences between uppercase and lowercase letters are ignored.) For example, “computer” is an isogram. The word“science” is not. If there happens to be more than one such longest isogram, then the first one in the paragraph can bechosen. Make certain to exclude any punctuation marks from your determination (for example, when the word appears atthe end of a sentence or contains an apostrophe). For example, the isogram “Kim’s” should be considered four characterslong, with the apostrophe ignored. Return the longest isogram on one line and its length on a second line whencommunicating back to the client. The method should accept a list of strings where each string is line of the paragraph The method should be public static String long_isogram(List<String> par){}
Write a program Calculator.java. Instead of using integers, use rationals, as shown in Figure .You will need to use the split method in the String class, introduced inSection10.10.3, Replacing and Splitting Strings, to retrieve the numerator stringand denominator string, and convert strings into integers using the Integer.parseIntmethod.
The String class implements Comparable, which means that two strings can be compared to each other. However, the default implementation orders strings based on the ASCII values of their characters, which means that strings that begin with an uppercase letter are always ordered before strings that begin with a lowercase letter. This means that the string “Zoo” would be ordered before the string “aardvark”. Write a Comparator that compares two strings alphabetically so that “aardvark” is ordered before “Zoo”. Hint: convert both strings to upper or lowercase before comparing them.
can you solve this please? Adopt appropriate Java animation code to implement the video in the file “test4.wmv” and given that the parametric equation for a circle. x=r*cos(t) y=r*sin(t) with t in range [0, 2p] and r is the radius of the circle. (the circle goes in a loop like in the images, i did my best to try to explain it , please try to do it ) and here is a sample of what they want me to use : package javaapplication1;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.awt.geom.*;import java.util.Random;import javax.imageio.*;import java.io.File;import java.io.IOException;import java.awt.image.BufferedImage;import java.awt.event.*;import java.util.Calendar; public class JavaApplication1 extends JApplet { public static void main(String[] args) { JFrame frame=new JFrame(); frame.setTitle("hello"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JApplet applete =new JavaApplication1(); applete.init();…
Java allows for methods to be chained together. Consider the following message from the captain of a pirate ship: String msg1 = " Maroon the First Mate with a flagon of water and a pistol! "; We want to change the message to read the message msg1: String msg2= “Maroon the Quartermaster with a flagon of water.” Three changes need to be made to adjust the string as desired: Trim the leading and trailing whitespace. Replace the substring First Mate with Quartermaster. Remove "and a pistol!" Add a period at the end of the sentence. A “chaining1” method which will apply in sequence 4 operations to perform the above. We will use the trim, replace, and substring methods, in this order. Thus the chaining1 method will receive a string msg1 and return a string msg2. Make sure msg2 is printed. A “chaining2” method which will apply the 4 operations above in one single statement. Thus the chaining2 method will receive a string msg1 and return as string msg2. Make sure msg2 is printed
Java allows for methods to be chained together. Consider the following message from the captain of a pirate ship: String msg1 = " Maroon the First Mate with a flagon of water and a pistol! "; We want to change the message to read the message msg1: String msg2= “Maroon the Quartermaster with a flagon of water.” Three changes need to be made to adjust the string as desired: Trim the leading and trailing whitespace. Replace the substring First Mate with Quartermaster. Remove "and a pistol!" Add a period at the end of the sentence. Need a java file Chaining.java that will declare the above and creates two methods to do the followings: A “chaining1” method which will apply in sequence 4 operations to perform the above. We will use the trim, replace, and substring methods, in this order. Thus the chaining1 method will receive a string msg1 and return a string msg2. Make sure msg2 is printed. A “chaining2” method which will apply the 4 operations above in one single statement. Thus the…
Imagine you are reading in a stream of integers. Periodically, you wishto be able to look up the rank of a number x (the number of values less than or equal to x). Implement the data structures and algorithms to support these operations. That is, implement the method track(int x), which is called when each number is generated, and the method getRankOfNumber(int x), which returns the number of values less than or equal to x (notincluding x itself).EXAMPLEStream(in order of appearance):5, 1, 4, 4, 5, 9, 7, 13, 3getRankOfNumber(l) 0getRankOfNumber(3) 1getRankOfNumber(4) 3
Given an JavaScript object list of books that each have a pages attribute to define the number of pages in the book, find the sum of all the pages in the object list of books using recursion. Keep in mind: The input list object may be completely empty (ex. {}) The next attribute may not be defined function getPageCount(list) {// your code here// returns an integer}Example test case:Input: {"book":"A","pages":1,"next":{"book":"B","pages":2,"next":{"book":"C","pages":3,"next": null}}}Output: 6Reasoning: 1 + 2 + 3 pages
How to answer the following question in java The equals method for Circle objects defined in the text determines equality of two circles using their radii. What is the output of the following code sequence? Circle c1 = new Circle(5); Circle c2 = new Circle(5); System.out.println(c1 == c2); System.out.println(c1.equals(c2)); A. true true B. true false C. false true D. false false Suppose we start with an empty SortedArrayCollection<String> object and add the elements "bat", "ant" "dog" "cat" and "eel" to the collection in that order. We then remove "cat". The element held in array index 2 will be: A. null B. "bat" C. "ant" D. "dog" E. "eel" Retrieval of an element from a collection is based on using: A. the equals method. B. the == operator. C. aliases D. all attributes being equal. Suppose we start with an empty SortedArrayCollection<String> object and add the elements "bat", "ant" "dog" "cat" and "eel" to the collection in that…
Implement a new concat method in the String class you worked on for HW2. The method should return a new String object that represents the text you would end up with if the argument String were "added onto the end of" this String. For example, in the code below, the String object answer should represent the text "bookstore" and true should be printed the screen. char[] bookA = {'b', 'o', 'o', 'k'}; char[] storeA = {'s', 't', 'o', 'r', 'e'}; char[] bookstoreA = {'b', 'o', 'o', 'k', 's', 't', 'o', 'r', 'e'}; String book = new String(bookA); String store = new String(storeA); String bookstore = new String(bookstoreA); String answer = book.concat(store); System.out.println(answer.equals(bookstore)); In the text area below, type in your definition of the concat method. (In other words, type in the code that should replace the //TODO comment.) Your code cannot call any methods. public class String { private char[] data; public String(char[] value) { data = new…