辅导案例MATH10001

MATH10001 Mathematical Workshop
MATLAB Coursework

1. Given that

f(x) = ecos(x)
g(x) = 2
(a) (3 marks) Write a script M-file to plot y = f(x) and y = g(x) on the same
axes for x between −pi
2
and 2pi. The code should label the axes.
(b) (2 marks) Amend your M-file from part (a) so that it ALSO finds, to four
decimal places, the first two positive solutions of f(x) = g(x).

1. (5 marks) Write a script M-file to implement the Secant method with x1 = −1.5

and x2 = −0.5 to find a solution of the equation below. Your solution should
be correct to 5 decimal places and your code must not do more iterations than
necessary to achieve this. Your code must output each iteration.
ecos(x) = 2

1. (a) (5 marks) Write a script M-file to implement the forward difference method

to estimate the gradient of y = ecos(x) − 2 at the point where x = 2. Your
code should use a FOR loop to estimate this gradient three times, once
using h = 0.1, once using h = 0.01 and once using h = 0.001.
(b) (2 marks) Differentiate y = ecos(x)−2 by hand and use your answer to find
to 7 decimal places the gradient when x = 2.

1. (5 marks) Write a script M-file to implement the mid-point rule to find the area

bounded by the curve y = ecos(x) − 2, the x axis and the lines x = −0.5 and
x = 0.5. Use strips of width 0.02.
Project Report
This project is worth 25% of the marks for MATH10001. The project report should
be word-processed using LATEX and include the M-files and their outputs. There are
3 marks available for accurate LATEX. To gain all the marks, your M-files must
contain comments to explain their structure and the report must be clearly
presented. To gain all the marks, your code should be as efficient as possible.
The project and report must be all your own work. Anyone suspected of
sharing M-files or copying another student’s work will be dealt with by the Academic
Malpractice Panel. Plagiarism guidance for students is linked on Blackboard and
available here.
You should submit your report through Blackboard by 4pm on Tuesday 5th
November 2019.
1
Presenting your answers
Upload a single pdf document via Blackboard and four M-files. (Question 1 can be
submitted in a single m-file). The pdf should have the following form;

1. The name of the M-file for this question followed by the graph it outputs and

the solutions it produces.

1. The name of the M-file for this question followed by the output.
2. a) The name of the M-file for this question followed by the output.

b) Show how you did the differentiation by hand, carefully typeset in LATEX,
and what the gradient is correct to 7 d.p..

1. The name of the M-file for this question followed by the output.

2
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