I am emailing a link of this to everyone on the class list every week. If you are not receiving these emails or want to have them sent to another email address feel free to email me at jpmccarthymaths@gmail.com and I will add you to the mailing list.

Continuous Assessment

You are identified by the last four digits of your student number unless you are winning the league. The individual quiz marks are out of 2.5 percentage points. Your best eight quizzes go to the 20% mark for quizzes. The R % column is your running percentage (for best eight quizzes), MPP is your Maple Percentage Points and the GPP is your Gross Percentage Points (for best eight quizzes and Maple). Most of the columns are rounded but column six, for quiz five, is correct.

S/N Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 R % QPP MPP GPP
Kelliher 3 3 3 3 2.3 98 12.3 4.5 16.8
8335 2 3 2 3 2.5 98 12.3 4.5 16.8
3281 2 3 3 3 2.1 96 12.0 4.5 16.5
5527 2 3 3 3 2.5 94 11.9 4.5 16.4
7878 2 2 2 2 2.1 85 10.6 4.5 15.1
8416 2 1 2 3 2.5 84 10.5 4.5 15.0
8478 2 2 2 2 0 82 8.2 4.5 12.7
1864 1 2 3 2 1.24 76 9.5 4.5 14.0
8403 2 1 2 3 1.3 76 9.5 4.5 14.0
4198 0 1 2 3 1.7 74 7.4 4.5 11.9
6548 2 1 2 3 1.6 71 8.9 4.5 13.4
8603 1 2 2 2 0 67 6.7 3 9.7
8556 1 1 2 2 0 66 6.6 4.5 11.1
2567 2 2 2 1 1.8 65 8.2 4.5 12.7
1852 1 1 2 2 2.1 57 7.1 4.5 11.6
2859 2 1 0 1 1.6 55 5.5 4.5 10.0
5546 0 0 1 1 1.9 53 4.0 4.5 8.5
7950 0 0 1 0 1.8 52 2.6 3 5.6
9464 1 1 2 1 1.24 46 5.7 4.5 10.2
7209 2 1 2 1 0.16 44 5.5 4.5 10.0
8455 0 1 1 1 1.9 38 4.8 4.5 9.3
4775 1 0 1 0 0.4 22 2.2 4.5 6.7
5553 0 1 0 0 0.1 17 1.3 4.5 5.8

Any students who missed a Maple lab are invited to do the lab in their own time. What you must do is take the Maple file and get through all of the exercises. When completed email me a copy of your Maple worksheet. Expect to take a good deal longer than an hour to complete. Note if you do this I will give you your 1.5% for that lab.

Here we do the Question 2 Questions.

2 i.

Determine \displaystyle \frac{\partial}{\partial y}(x^3-4y^2\sin(y)+y^4).

Solution: We have

\displaystyle \frac{\partial f}{\partial y}=0-\frac{\partial }{\partial y}(4y^2\sin y)+4y^3.

The middle term needs a product rule:

\displaystyle\frac{\partial f}{\partial y}=-(4y^2\cos y+\sin y(8y))+4y^3=4y^3-4y^2\cos y-8y\sin y.

2 ii.

Determine \displaystyle\frac{\partial }{\partial x}\left(\frac{x^2e^y}{4x-1}\right).

Solution: This requires a quotient rule:

\displaystyle\frac{\partial f}{\partial y}=\frac{(4x-1)e^y2x-x^2e^y(4)}{(4x-1)^2}

\displaystyle=\frac{8x^2e^y-2xe^y-4x^2e^y}{(4x-1)^2}=\frac{4x^2e^y-2xe^y}{(4x-1)^2}.

2 iii.

Determine \displaystyle\frac{\partial}{\partial x}(e^{2xy}-x\,\sin(xz)).

Solution: Using the chain rule and the product rule (and the chain rule therein):

\displaystyle \frac{\partial f}{\partial x}=e^{2xy}\frac{\partial}{\partial x}(2xy)-\left(x\cos(xz)\frac{\partial}{\partial x}xz+\sin(xz)(1)\right)

\displaystyle=e^{2xy}(2y)-(x\cos(xz)\cdot z+\sin(xz))=2ye^{2xy}-xz\cos(xz)-\sin(xz).

Quiz 6 Question Bank

The question bank for Quiz 6 (in Week 8) is as follows:

  • P.65 Q. 2,3 and 4 (take the error in C to be 0)
  • P.75 Q. 1-4, 7*-8

*answer should be (0,1) rather than [1,2].

There is no value in writing down the final answers alone — you will receive marks for full and correct solutions — but nothing for final answers without justification or skipping important steps. Please don’t learn off model solutions — you need to understand the material not just on a superficial level to do well later on. Quiz 6 runs from 19:00 to 19:15 sharp on Wednesday 25 March.

Academic Learning Centre

The word on the Academic Learning Centre is that although the evening session perhaps might have been made exclusive to evening students, the fact of the matter is that they are not.

My departmental head suggested that if a group of ye want to get an improvement in your ALC experience, that ye should email questions to catherine.palmer@cit.ie in advance of the session. Dr Palmer said that this will allow her to more easily help ye.

Week ‘6’

Remember we have a ‘Maple night’ on April 1 in the normal rooms.

Maple Labs

We next have a Maple Lab Wednesday 1 April. Group 1 – Starts at 18:00 and Finishes at 20:50: Wednesdays 18:00-19:05 – Maple Lab in room C219 Wednesdays 19:15-19:30 – Weekly Quiz in C212 Wednesdays 19:30-20.50 – Theory class in room C212 Group 2 – Starts at 19:15 and Finishes at 22:00: Wednesdays 19:15-19:30 – Weekly Quiz in C212 Wednesdays 19:30-20:50 – Theory class in room C212 Wednesdays 20.55-22:00 – Maple Lab in room C219 As you can see here you can download a student copy of Maple. Some students said that they were unable to open the file I sent in their Maple 17 — this is strange as I am actually using Maple 16!

Week 7

In Week 7 we finished off Error Analysis and started looking at some numerical methods of solving equations. In Maple, we looked at Partial Differentiation and Error Analysis.

Week 8

In Week 8 we will finish off looking at the Newton Raphson Method and learn how to numerically approximate integrals.We might start the final chapter.

Study

Please feel free to ask me questions about the exercises via email or even better on this webpage. Anyone can give me exercises they have done and I will correct them. I also advise that you visit the Academic Learning Centre.

Continuous Assessment

The Continuous Assessment is broken into Weekly Quizzes (20%) and Maple (10%). There will be eleven weekly quizzes and your eight best results will count (so 2.5% per quiz from eight quizzes). You will receive an email (i.e. this one) on Thursday/Friday detailing the examinable exercises. Maple consists of five labs and a Maple Test in the sixth lab. Satisfactory participation in labs gives you 1.5% and the Maple Test is worth 2.5%. More on this in the coming days.

Student Resources

Please see the Student Resources tab on the top of this page for information on the Academic Learning Centre, etc..

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