Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

You have plenty of time to change your mind. The most valuable thing that school can give you is the ability to teach yourself.

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**zetafunc.****Guest**

I agree, and there will be a lot of that at university too.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

Yes and you will be larning something everyday. What could be better than that?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

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**zetafunc.****Guest**

Not many things. I like the fact that there are some nice easy modules in the first year. The Fourier series problem sheets are gifts!

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

They gave them to you already?

**In mathematics, you don't understand things. You just get used to them.**

**I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.**

**Online**

**zetafunc.****Guest**

No, I have been looking at some of the older ones online, from their official exam papers. The questions are surprisingly repetitive.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

In what way. They are almost worded the same?

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Yes. The first part is always the same, and the question itself is only just slightly varied... for example:

2002

(a) State, without proof, the general formula for a Fourier series on (-L, L), with

L > 0, for a function f(x), giving the expressions for the coefficients.

(b) On (-π,π), find the Fourier series of f(x) = exp(x).

(c) Hence or otherwise, find the Fourier series of g(x) = sinh(x), and h(x) =

cosh(x), each on the range (-π,π).

2003

(a) State, without proof, the general formula for a Fourier series on (-L, L), with

L > 0, for a function f(x), giving the expressions for the coefficients.

(b) On (-π,π), find the Fourier series of f(x) = x.

(c) Hence or otherwise, find the Fourier series of g(x) = x[sup]2[/sup], on the range (-π, π).

(d) Hence, or otherwise, show that

2004

(a) State, without proof, the general formula for a Fourier series on (-L, L), with

L > 0, for a function f(x), giving the expressions for the coefficients.

(b) On (-π,π), find the Fourier series of f(x) = exp(x).

(c) Hence or otherwise, find the Fourier series of g(x) = sinh(x) + 2cosh(x), on

the range (-π,π).

2005

(a) State, without proof, the general formula for a Fourier series on (-L, L), with

L > 0, for a function f(x), giving the expressions for the coefficients.

(b) On (-π,π), find the Fourier series of f(x) = |x|.

(c) State Parseval's identity.

(d) Apply Parseval's identity to the function of part (b) to obtain an infinite series

for a power of π.

2006

(a) State, without proof, the general formula for a Fourier series on (-π,π) for a

function f(x), giving the expressions for the coefficients.

(b) Find the Fourier series of f(x) = sign(x) on (-π,π).

(c) State and prove Parseval's identity for a function on (-π,π).

(d) Hence, or otherwise, prove that

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

Yea, well at least there are asking for different functions.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Meh, I guess it is not too bad... just means I am more likely to pass, so no need to revise as intensely and so more time to study more maths on the side.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

I thought it got tougher when they started to go into FFT's.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

I agree, Fourier transforms are a lot more difficult conceptually.

adriana should be in Italy right about now.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

Italy? What the heck is she doing there. Another boyfriend?

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

I think she is going there with friends. But she followed it up with "then I'm going to spend a month with my boyfriend in Cyprus" followed by a nice big bright yellow smiley face. Because, you know, there's no harm in rubbing it in.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

They are meaner than a starved pit bull. But that was a good favor to you.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Yeah, she doesn't seem like the type of person I want to be hanging around with, anyway...

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

That is one thing but those little digs will really do more for you than 5800 posts with me. Each one will make you a bit harder and meaner, and they will appreciate that.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

I don't know about that. As a result of this thread I am definitely a lot more detached and uncaring about their antics than I used to be.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

Nope, this thread had little to do with it. They are your educators. You noticed her comment, you know what she is thinking and feeling. You will begin to make changes in your strategy. Each change towards less genuine caring to insincere taking of what you want will be applauded by them. Your results will soar.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

Maybe not soar, but perhaps increase gradually.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

The difference between yes and no can never really be gradual. It will be as if someone turned on the light in a dark room.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

I guess that depends on how I approach it. If I approach one girl every 6 months, then I agree, it will be like that. If I ask 100 per hour, I think the improvements may be more gradual.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

If you ask 100 per hour you will have trouble dealing with all the action. I suggest two or 3 a week to start.

**In mathematics, you don't understand things. You just get used to them.**

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**zetafunc.****Guest**

But in the meantime, there is no time to learn mathematics like the summer. Until that thirst is quenched, the girls can wait.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 91,663

That is okay because once the other thirst sets in there will be no time for anything else!

See you a little later, got to rest.

**In mathematics, you don't understand things. You just get used to them.**

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