## Search found 301 matches

Fri Aug 15, 2008 12:35 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Someone gets a distinction every year. Infact, lots of people get distinctions every year.

But anyway, how did you do? Did you do well and make your offer.

Edit: Saw your merit. Congratulations! That is a great result.
Fri Aug 15, 2008 11:40 am UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Well, results are in and I got a Distinciton. (I also got an S in STEP I)

I guess this would be the best place to post results so meh.

How did everyone else do? Make their offers?

@The guy who applied to Worcester, nice college isn't it
Sun Jul 13, 2008 12:13 pm UTC
Forum: Mathematics
Topic: Mathematicians on wikipedia display liberal bias
Replies: 35
Views: 5716

### Re: Mathematicians on wikipedia display liberal bias

Can someone clarify, is conservipedia a joke site like uncyclopedia etc or is it serious?
Wed Jul 09, 2008 5:14 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

You didn't need those theorems, they just cut down on time
Mon Jul 07, 2008 7:04 pm UTC
Forum: Mathematics
Topic: Euler's Formula
Replies: 8
Views: 1359

### Re: Euler's Formula

No, it doesn't rotate by x, but by ln a x
Mon Jul 07, 2008 6:35 pm UTC
Forum: Mathematics
Topic: Euler's Formula
Replies: 8
Views: 1359

### Re: Euler's Formula

z4lis wrote:I realize it's trivial, which is exactly why I'm curious as to why we don't use the more general form. It seems sort of bizarre to me.

The simple form has more uses in the area of complex numbers, ie rotation angle A is multiplication by e^{iA}
Mon Jul 07, 2008 6:02 pm UTC
Forum: Mathematics
Topic: Euler's Formula
Replies: 8
Views: 1359

### Re: Euler's Formula

e's reign over exponents is rather unfair, I think it's time to let all those other numbers have a chance in the spotlight! a ix = cos(x*ln(a)) + i*sin(x*ln(a)) The odd thing is... I've never seen that above equation, until I derived it last night. Surely it's been floating around for years, and is...
Sun Jul 06, 2008 8:29 pm UTC
Forum: Mathematics
Topic: Intro Analysis question
Replies: 12
Views: 1631

### Re: Intro Analysis question

I'm guessing you have to find a function which acts as a contradiction?

In which case, consider A = R-, B = R+, f(x) = x^2
Fri Jul 04, 2008 3:48 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

A bit late to jump into this but hey, thats what foras are for (Yay visiting Oxbridge, Camford and doing DofE gold) Token's solution to the last part of 7 seems a bit wild for a AEA question I don't recall that being well known to A level students. Would using that count against you if you didn't qu...
Wed Jun 25, 2008 4:11 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Since the paper is online, you can all chat about it.

I myself am of to visit some unis!

http://eiewebvip.edexcel.org.uk/Reports/Confidential%20Documents/0806/9801_01_que_20080625.pdf
Tue Jun 24, 2008 7:26 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Hmm.. I would probably say that that was a bad idea. STEP and AEA do require some work.
Tue Jun 24, 2008 7:10 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

Yeah, IMO is a sore point for me too. I only took it for the first time this year which means I'm miles behind anyone with a serious chance of anything.
Tue Jun 24, 2008 7:05 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Your value for u looks familiar. (Not guaranteeing anything since I haven't done the question in ages)
Tue Jun 24, 2008 6:44 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Thats not "why" it works, but its one way of implementing it, although in general multiplying through by dx isn't allowed
Tue Jun 24, 2008 6:31 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

I'd carry out all the differentiation on the x's first.

BTW, have you been taught that its acceptable to "multiply through by dx"
Tue Jun 24, 2008 6:17 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Out of interest, how did you go about solving it (I have a single solution)
Tue Jun 24, 2008 6:00 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Which one was that?

(I'm fairly sure I've done them all)
Tue Jun 24, 2008 5:36 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

Yes, I believe so
Tue Jun 24, 2008 5:31 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Indeed, although I'd much rather be taking STEP II, but still, better than a kick in the teeth.
Tue Jun 24, 2008 5:19 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Hey, I don't need to pass. My offer for Oxford is AAA, and I already have AA. This is just for fun. in fact I had to negotiate with the head of department to let me sit it, I would have sat the STEP papers too, but that would have been pushing it a bit. :D] Try explaining wanting to take STEP and A...
Tue Jun 24, 2008 5:17 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

Nope there is a slightly wider syllabus for STEP and the standard A level is much less than is actually in the syllabus
Tue Jun 24, 2008 4:17 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

Oh, this isn't a general thing - the standard british A-level maths syllabus is absolutely appalling. So places like Cambridge ask for STEP as part of their offers. Since there is only one place like Cambridge, only Cambridge requires a high mark. Oh, and I should probably be bowing to you, given t...
Tue Jun 24, 2008 4:15 pm UTC
Forum: Mathematics
Topic: AEA Maths Questions
Replies: 58
Views: 4546

### Re: AEA Maths Questions

Nope AEA is easier that STEP I as well (I took it yesterday and will rue it forever that I didn't take III given that I could solve 4 of their questions)
Tue Jun 24, 2008 6:46 am UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

So, how did you find it?

I say STEP I, although I have seen a few questions from this years STEP III.

Q7 was easy along with Q8
Q13 looks nice too

That would be me sorted
Mon Jun 23, 2008 9:27 pm UTC
Forum: Mathematics
Topic: Number problem
Replies: 44
Views: 4386

### Re: Number problem

No, its just before the magazine's deadlines run out on submitting solutions.

EDIT: Yay 256 posts
Mon Jun 23, 2008 9:25 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

STEP - Sixth Term Extension Paper is an admission paper to get into Cambridge to study mathematics.

There are 3 papers, I, II and III.

I and III were sat today.
Mon Jun 23, 2008 7:29 pm UTC
Forum: Mathematics
Topic: Number problem
Replies: 44
Views: 4386

### Re: Number problem

Nightbreeze wrote:Would that make a difference to any of you people?

At least one person (me), MathLinks have a similar policy regarding current magazine questions (There is a problem with M&Y questions being on the fora all the time)
Mon Jun 23, 2008 6:42 pm UTC
Forum: Mathematics
Topic: Number problem
Replies: 44
Views: 4386

### Re: Number problem

It's just a math puzzle I came across somewhere

I'm just wondering whether this is the sort of thing where you send solutions back in as well
Mon Jun 23, 2008 6:28 pm UTC
Forum: Mathematics
Topic: Number problem
Replies: 44
Views: 4386

### Re: Number problem

I think the OP knows where this problem comes from

The problem is taken from a monthly math magazine, which features 3 math problems each month.

Mon Jun 23, 2008 4:32 pm UTC
Forum: Mathematics
Topic: STEP III, 2008
Replies: 28
Views: 2766

### Re: STEP III, 2008

Please do not discuss this until 4:30 tomorrow (The same rules are being applied on all other British mathematics fora)

I did I, although I am chatting to loads of people who took III
Wed Jun 11, 2008 3:47 pm UTC
Forum: Mathematics
Topic: Exam question.
Replies: 9
Views: 2071

### Re: Exam question.

Use the first part of the question on the cot^2 x (It was about the Pythagorean identities) to get it all in terms of cosec x (and solve the quadratic)
Tue Jun 10, 2008 8:52 pm UTC
Forum: Mathematics
Topic: Exam question.
Replies: 9
Views: 2071

### Re: Exam question.

Maybe illegal was the wrong word, but they are certainly not "class tests" These are external exams, which for some people may be their final maths exam on which a grade is based (and hence job/university options are decided) (so its not simply a test which has no importance) @OP: Good luc...
Tue Jun 10, 2008 8:41 pm UTC
Forum: Mathematics
Topic: Logic And Conditionals
Replies: 11
Views: 1516

### Re: Logic And Conditionals

Yes, the reason is that it is paradoxical and contains a contradiction. We like maths to be free from them so we use axioms so we can all agree on what is an acceptable statement.
Sun Jun 08, 2008 10:10 pm UTC
Forum: Mathematics
Topic: Theorems named after the wrong people
Replies: 21
Views: 8378

### Re: Theorems named after the wrong people

Pell equations? I think that Euler has enough named after him to be honest, and I think the real reward is less in the name and more in the thrill of discovering and success in resolving a problem
Fri Jun 06, 2008 10:18 pm UTC
Forum: Mathematics
Topic: Exam question.
Replies: 9
Views: 2071

### Re: Exam question.

That sin is a cosec, and technically this is illegal. Edexcel does not permit discussion of their exams until 24 hours after they are taken, (sorry)

And this question was made easier when considered with the first part
Fri Jun 06, 2008 8:08 pm UTC
Forum: Mathematics
Topic: Quiz me on infinite series!
Replies: 16
Views: 2300

### Re: Quiz me on infinite series!

That term isn't 2k/5^k, it is the binomial coefficient 2k, k times 1/5^k
Fri Jun 06, 2008 9:23 am UTC
Forum: Mathematics
Topic: Quiz me on infinite series!
Replies: 16
Views: 2300

### Re: Quiz me in infinite series!

BirdKiller wrote:By geometric test where |r| = 2/5 < 1, this series is convergent, the sum being 5/3

The sum isn't right.

Also, rather than 5 and 7, try 3 and 5 (and you've got it upside down anyway)
Fri Jun 06, 2008 8:39 am UTC
Forum: Mathematics
Topic: Quiz me on infinite series!
Replies: 16
Views: 2300

### Re: Quiz me in infinite series!

I expect you've probably seen these, and they're not too hard for an undergrad either, but anyway

$\sum_{k=1}^{\infty} {2k \choose k} \frac{1}{5^k}$

$\sum_{k=1}^{\infty} \frac{5^nF_n}{7^n}$ where Fn is the nth Fib number
Sun Apr 20, 2008 7:21 pm UTC
Forum: Mathematics
Topic: factoring argument
Replies: 9
Views: 1743

### Re: factoring argument

NathanielJ wrote:If you're thinking of something like the difference of squares technique

Isn't this exactly the difference of two powers technique.

xa-ya = (x-y)(xa-1y0 + xa-2y1 +...)

Interesting aside.

Look to find the sum of two odd powers factorisation
Fri Apr 18, 2008 9:23 am UTC
Forum: Mathematics
Topic: Math Books
Replies: 378
Views: 253154