I am emailing a link of this to everyone on the class list every Friday afternoon. 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.ie and I will add you to the mailing list.
Test
The test will take place at 3 pm in WGB G 05 next Friday 2 November in Week 6.
I would’ve intended that everything up to and including section 2.2 is examinable for the test.
You can find the tests I set for the last two years after Exercise Sheet 1 — which is itself after page 49. Also there is a sample from last year here.
As we will not have covered continuity, we will not be able to do the questions two as they are phrased. However we have covered limits.
I will make some brief remarks on these tests now.
“MS2001: Test 1 A Solutions”
- Note that we have only done Q. 1(a) using the Alternate Solution given. This question is worth 5/12.5 = 40%; the thinking being that to be of passing standard you must be able to do this ‘exercise’ question.
- In light of us not covering Continuity on time, the first part of question could read “Find
or else explain why it does not exist.” To answer this you would have to look at the left- and right-hand limits and invoke Proposition 2.1.3. The second part might ask you “for what values of
does
exist”, and you would once more have to invoke Proposition 2.1.3. This question is worth 4/12.5 = 32%; the thinking being to get a first you should be able to do the ‘exercise’ question, and this, an ‘exam’ question.
- For Q. 3 of the test, you need to know and understand the following definitions: even, odd, increasing, decreasing, quadratic, roots, polynomial, rational function, absolute value, limit, one-sided limit. Q.3 is a harder question and the thinking behind this is that you can get 72% a bare first if you get all of Q.1 and Q.2 — but you will have to be even better than this to get a higher mark. You get one mark for one right, two marks for two right and three plus a bonus half-mark for all three right.
“MS2001: Test 1 A and 1 B Q 3”
I will not ask you for a definition in question two. Again the question could be “Find or else explain why it does not exist” and “for what value(s) of
does
exist?”
Lectures
We are in the middle of section 2.3.
Tutorials
Remember you can ask whatever you want in tutorials. If you have questions about the test or past exam papers work away.
Tutorial 4 Question Bank
Question 10 from Exercise Sheet 1 (after page 59 in the notes)
Questions 5, 6 (i), (ii), (iii), 7 from Exercise Sheet 2 — but don’t worry about removable and essential discontinuities (we are using the terms skip-discontinuity and blow-up) (after page 62 in the notes)
Question 1 from MS2001: Exercises (before page 63 in the notes)
Questions 23, 31- 37 from the Additional but Harder Exercises for Definitions I (just before page 60 in the notes).
Tutorial 3 Question Bank
Question 9 from Exercise Sheet 1 (after page 59 in the notes)
Questions 1 – 4 from Exercise Sheet 2 (after page 62 in the notes)
Questions 4 from MS2001: Exercises (before page 63 in the notes)
Questions 27 – 30 from the Additional but Harder Exercises for Definitions I (just before page 60 in the notes).
Tutorial 2 Question Bank
Questions 4, and 6 – 8 from Exercise Sheet 1 (after page 59 in the notes).
Questions 1 – 3 from MS2001: Exercises (before page 63 in the notes)
Questions 17 – 22 and 24 – 26 from the Additional but Harder Exercises for Definitions I (just before page 60 in the notes).
Tutorial 1 Question Bank
Questions 1, 2 and 5 from Exercise Sheet 1 (after page 59 in the notes).
Questions 1 to 16 from the Additional but Harder Exercises for Definitions I (just before page 60 in the notes).
4 comments
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October 31, 2012 at 8:33 pm
Student 23
Hi J.P.
In one of the test solutions provided in the booklet it says:
Q: Suppose that
is a function, increasing on the interval
. Which of the following are true?
,
.
Ans: For any
Can you explain why this is the case ?
Thanks
October 31, 2012 at 8:39 pm
J.P. McCarthy
Algebraically we have the definition:
Thinking like this we can say that if
then at the very least
as
is the largest element of
. Therefore if we have
and
increasing we have, by definition of increasing,
That is the technical answer.
Thinking geometrically helps though. If a function is increasing then the bigger the value of
, the bigger the value of
. In other words as
grows from
to
the function
is increasing so that it's maximum occurs at
.
So the biggest
can get on
is
and thus if you pick any
we have
Regards,
J.P.
November 2, 2012 at 8:51 am
Student 23
Hi J.P,
Could I just ask you for the answer of the Question one from last years test the inequality? The question is
Do I start this by multiplying both sides by the bottom thing squared?
November 2, 2012 at 8:54 am
J.P. McCarthy
I am a little short of time so will point you towards the solution of a similar problem: Q.1 (a) from last year:
Click to access solutions.pdf
The important thing to understand is how we use the properties of the absolute value function to simplify this and that we can only multiply both sides of an inequality by a positive thing… in this case after we write the absolute value of the fraction as a fraction of the absolute values, we multiply across by
which is positive.
Regards,
J.P.