solutions

**thuc** · 27 Oct 2009, 4:58 PM

Hmm just typed it up just then - probably some incorrect answers as I haven't checked my solutions yet - and I can't be bothered.

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**thuc** · 27 Oct 2009, 5:11 PM

Sorry, just realised that the rapidshare link had a restriction of 10 downloads. Here's a new one:

http://www.mediafire.com/?migwq5zwnyu

**tacogym27101990** · 27 Oct 2009, 5:34 PM

can you also post up the paper please?

**lolokay** · 27 Oct 2009, 6:10 PM

a couple mistakes (from the first link):

in question 3. d), you have an x², but it should just be an x, so the integral there is incorrect

Q 7 a) ii) is great! you just need to add the 2 metres of the person's height, which then gives 124.68 (still under 125)

everything else seems fine

**Puttah** · 27 Oct 2009, 6:10 PM

Just a few mistakes I noticed at a quick glance:

Q2d) the circle has radius 2, not 1
Q3a iii) I'm pretty sure the x-intercepts are at x=0,2,-2

But really nice stuff

I especially like how easy you made Q7 ii) seem. Damn that one was impossible in my eyes hehe

**NitroBoon** · 27 Oct 2009, 6:27 PM

and also, for Q2 (i) the answer is to be in the form a+ib so it should be 0+1i not just i.

furthermore, for Q6(a) volumes, isnt the height of the rectangular cross-section (4-x) not y, because h/(4-x) = tan(45) = 1 so the integral is wrong.

**tommykins** · 27 Oct 2009, 6:35 PM

Originally Posted by NitroBoon

and also, for Q2 (i) the answer is to be in the form a+ib so it should be 0+1i not just i.

furthermore, for Q6(a) volumes, isnt the height of the rectangular cross-section (4-x) not y, because h/(4-x) = tan(45) = 1 so the integral is wrong.

They wouldn't care tbh.

**Puttah** · 27 Oct 2009, 6:37 PM

i is in a+ib form. It's just that a=0 and b=1.

Yeah it should be y^2

**thuc** · 27 Oct 2009, 6:52 PM

Well spotted, everyone.

Bah, silly mistakes everywhere. But that saved me a lot of trouble, so thanks.

I'd have to agree with NitroBoon though - had I read the question more carefully, I wouldn't have taken the risk (of them possibly caring) and just write 0+i.