I passed, so damn relieved. Half this stuff didn't click for me :P]]>

i need to pass!! i surely hope so.]]>

The books say pick values where the final diagrams differ, but they always include values outside that range aswell anyway.]]>

there are 8 large beads and this question talks about arranging them in a triangle three per side with the platinum one on the top vertex. If I count that I come to 9 (three per side) plus one (platinum) in the triangle which is not possible since there are only 8 large beads.

Any takers?]]>

I just want to find out:

- Table 1.8 on page 35, Chapter 1, is all of the "very" important to learn?

Thanks]]>

I found a set of lecture videos for discrete mathematics. It's about 3GB in total.

Would anybody in Gauteng be interested in downloading and burning it to DVDs? (It's open content, so it's legal to do that.)

http://www.aduni.org/courses/discrete/index.php?view=cw

Regards,

Gustav Bertram]]>

"Set Cardinality and the Pigeonhole Principle, p. 292;"

Regards]]>

____ is a partition of A union C:

A. {1,2,3,4}

B. {{1,2,3,4}}

C. {{1,2},{3,4}}

D. {{1},{2},{3},{4}}

According to the definition on pg 205 of E&C, the partition of X is any set of subsets (or parts) that have no elements in common, and the union of all parts is equivalent to X.

A union C = {1,2,3,4}, so answers B, C and D all fit the definition of a partition of A union C. The question therefore should probably be:

____ is NOT a partition of A union C.]]>

But i still have these lingering questions:

A={1,3} D={empty,1,2}

Question 3:

A union D is the set:

1) {empty, 1,2,3}

2) {{empty},1,2,3}

3) {1,2,3}

4) {empty,2,3}

There are two correct answers given. what do i do?

One is more correct than the other... but then the given sets had the same problem as the slightly more incorrect answer which makes me wonder if you want me to include the problem.

Oh and another thing, the book makes no mention of the + operator on sets, but the assignment has both + and u (union) which would imply they are somehow different operations. Whats the deal?]]>

And can anybody help me with the unique number for this assignment?Thanks.]]>

We are allowed to submit our online assignments in PDF format.

Since LaTeX was written to typeset mathematical texts, and since it can export to PDF, I thought I would try using it for my assignments.

Most Linux systems have a LaTeX implementation already installed. Windows users can use MiKTeX (http://www.miktex.org/) which is an up-to-date LaTeX implementation for Windows. (The only drawback is that the basic package is 80MB!)

The format requirements are:

* Use A4 pages

* Use black text only

* Use only common fonts like Times Roman, Arial, etc.

* Limit your font size to max. 16 for headings and max. 12 for normal text.

* Use a margin of 5cm on the right side (in services and procedures)

OR

* Set margins of at least 2,5 cm on either side (on MyUNISA website)

Since we're exporting to PDF, line breaks and spacing shouldn't be a problem.

I don't know how to set all these options in LaTeX yet, so if there's a LaTeX guru here, I'd appreciate some help.]]>

I did the exercises for this section, and I derived a different recursive formula for 1c. I was wondering if I could prove the book answer and my answer are equivalent.

Given the sequence (2, 5, 10, 17, 26, 37...), describe the recursive formula.

I said:

a sub n = (sqrt(a sub n-1 - 1) + 1)^2

The book said:

a sub n = a sub n-1 + (2n -1)

I know both are correct, but is there a way to prove it?

Also, this notation is somewhat clumsy. Is there any way we can attach images to messages, or use TeX or another standard ascii maths notation?]]>

"If any integer is divisable by 3, then the number n^2 + 3n is divisable by 9"

"PROOF: ...By Proposition 1,n+3 is divisable by 3"

1.) How is this true?

2.) Is it "n which is divisable by 3 plus 3"?

3.) Is it safe to conclude that "any integer divisable by x is n+x"?

"...and so by Proposition 2,n.(n+3) is divisable by 9"

1.) Is there any link between n+3 of proposition 1 and the (n+3) part of n.(n+3)?

"...Since n^2+3n=n.(n+3),this establishes that n^2+3n is divisable by 9"

1.) Do I conclude this, because if i substitute anything divisable by 3, it will be divisable by 9 as well?

If i take another example:

"If n is any integer divisable by 5, then n^2+5n is divisable by 10"

1.) n divisable by 5=(n+5)

2.) n^2+5n=n.(n+5)

3.) What if it was n^2+6n and i got n.(n+6)?

4.) if n^2+6n, would the integer then have to be 2,even,3 or 6?

Thank you]]>

I really need help with example(1)page24,I don't understand it at all.

Dikeledi]]>

In the first assignment, question 8, i find the question a little ambiguous. Are they asking for the Quantified statement for Every integer x, 2x=9, or the Statement for the Negation Every integer x, 2x!=9.

Any ideas?]]>

Example 10 on pg 18 gives

...

...=3.(3^n-1 -2)+4

...=3^n -6 + 4

...=3^n - 2

...

How does 3(3^n-1) produce 3^n?]]>

IP Dimension (Pty) Ltd have a position available for a Desktop Support Technician, Please forward CVÃ¢â‚¬â„¢s to cv@ipdimension.net.

Regards]]>

p. 20. The closed formula given as the solution to Practice Problem 2(b) is incorrect. The closed formula for sum b should be 5x2 to the power of n-1, i.e. 5.2^(n-1).

Regards

Tertia Horne

Lecturer COS101S]]>

user friendly intro discreet mathematics of computer science by Labuscagne

R 150

like new

Shabeer - 082 885 5133]]>

What is going on in this section?

In example 1 page 24 they state:

Statement 1: <A> Exactly One is Lying. p = <A> is truthful

Statement 2: <B> At Least One is Lying. q = <B> is truthful

OK. Now we have all the POSSIBLE different variations: TT, TF, FT and FF (this I understand.)

So when they use the first variation p,q : T,T They are actually stating:

p = <A> is truthful : True and

q = <B> is truthful : True

Then in the next column they state:

<A> = F and <B> = T

1. So how do I know that if the statement "Exactly One is Lying" is "truthful" and

True that when going to the next column that the statement is False??

2. Even if the answer in (1.) is based on the fact that statement 2 is True, how

do I know statement 2 should be true.

I am really confused with this section and any help would be appreciated since I want to move on!!

Best regards,

SheeP:X]]>

Thanks]]>