Mathematics

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IT 205

Final Exam :

Directions:

Create a new file for each question with the name Final_ YourFirstName_Q# (If your name is John, the file name is Final_John_Q1.

Pay attention to the directions as to which commands to run in the editor window or the command window.

Use the Run icon to run commands from the Editor Window.

Save a workspace for each question called YourFirstName_q# (for instance, question 1, part c) workspace will be called YourFirstName_q1c). Click on Home tab to save a workspace.

  1. a) Create a new file for question #1. Run this command in the Matlab EDITOR WINDOW:

Q = randi ([1 10],3,5)

Copy the result into your answer sheet.

1. b) Create a 4×5 matrix called A that selects random numbers from 0 to 35 using “randi”. Type your command in the EDITOR WINDOW. Save your workspace.

Copy the resulting matrix into your answer sheet.

1. c) How many numbers need to be changed in order to have no repetitions? Write it down in the EDITOR WINDOW as a comment. Copy this answer into your answer sheet.

  1. d) Using the COMMAND WINDOW, if a number is repeated, change the other number(s) to a unique number that is not shown in the matrix using the same range 0-35. To do this use a command that designates which row and column to change the repeated numbers in your matrix into a non-repeated number of your choice. You should obtain a 4×5 matrix with 20 unique numbers in the given range after completion.

Copy and paste all the commands with the results into your answer sheet.

  1. e) Change the name of your matrix to a double letter if the old one was called A, call the new one AA. Save your workspace.

Copy the new matrix into your answer sheet.

  1. a) Create a new file for this question. In the new matrix (AA), look at the First Row and write down which row and column has the smallest number in the First Row. (for example AA(1, 6) ). Write it down as a comment in the EDITOR WINDOW.

Copy the result into your answer sheet.

2. b) In the EDITOR WINDOW, write a command to calculate the square of all elements in that column found in part (a). Name it AASq for example: AASq = …. Note that AASq should be a 5×1 matrix.

Copy the result into your answer sheet.

2. c) In the EDITOR WINDOW, write a command to replace the column with the next lower number with AAS. Copy the result into your answer sheet. Name the new matrix B. Save your workspace and save your editor file.

** Note that if you make a mistake in question 2, because the values of the matrix AA may change, in order to redo, write in the Command Window: AA = A. Then start again from part 2 (a).

  1. a) Create a new file for question #3. Run this command only once in the MATLAB EDITOR WINDOW. You will lose points if you run it more than once:

Q = randi ([8],1)

Copy the result into your answer sheet.

3. b) Use the Intermediate Value Theorem to determine whether each of the following equations has at least one solution in the given intervals. Select the question below based on the number you obtained from question 3 (a). (For example, if part 3 (a) = 8, you will select question #8 below). In the EDITOR WINDOW, write the appropriate commands to solve the problem.

Copy the result into your answer sheet. State why you think there is a solution if any.

Save your workspace and save your editor file.

Capture  3 final.PNG

  1. a) Create a new file for question #4. Run this command only once in the Matlab EDITOR WINDOW. You will lose points if you run it more than once:

S = randi ([8],1).

Copy the result into your answer sheet.

Find the second Taylor Polynomial P2 (x) about the point x0 = 0

Capture 9 Taylor equation.PNG

Select the question below based on the number you obtained from question 4 (a). (For example, if part 4 (a) = 8, you will select question #8 below).

Let f(x) =

Capture 4 Final.PNG

In the EDITOR WINDOW, write the appropriate commands to find the second Taylor Polynomial by following the directions below.

4. b) Calculate and Copy the result for f and f(x0) into your answer sheet.

4. c) Calculate and Copy the result for first derivative f’ and f’(x0) into your answer sheet.

4. d) Calculate and Copy the result for second derivative f’’ and f’’(x0) into your answer sheet.

4. e) Calculate and Copy the final result P2(x) into your answer sheet.

Save your workspace and save your editor file.

Submit your workspace file and all the question files into Canvas. There is a little triangle on top of the command window. Click on it and print it into a PDF file called Final_YourFirstName. Submit that file into Canvas.

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