Exams and whatnot

[Lizi Beee]

I'm not even gonna count mine, cos i don't want to know.. but i don't think my M2 went v well today... i just was v stupid on it... meh well... what's done is done.

[Fratello de Pingu]

just physics moduals 2&3 to go

[Super Andy]

biology was like so much easier then i thought, i actually thought i was gonna fail it cus i'm so rubbish at it, but it wasn't really even hard. oh well, i guess that mean either the chemistry or physics is gonna be rock solid...

[magic mike]

biology was like so much easier then i thought

you're right that was the easiest biology paper i have ever done and the first science paper when i've stopped writing and closed my paper that much earlier than the time allowed

[Super Andy]

well lucky it wasnt hard, or otherwise i might have failed it, lol

[Rachel]

All my exams are over.
And exam leave isn't over till Monday
The weather is nice
So I am happy

[Fratello de Pingu]

I've got until a week on Monday before going back

[bob h]

I struggled on the get a on its own but i tried it again now and still can't get it i thought you're supposed to find that P=n and therefore n=1 and then a=anything but that can't be right. Someone please help.

I found this hard too.
I think this is the solution...

Start with: P=(nsquared - a)/(n-a)
Then multiply everything by (n-a) to get: P(n-a) = nsquared - a
Expand this to: Pn - Pa = nsquared - a
Then add Pa to both sides to get: Pn = nsquared - a + Pa
Take nsquared from both sides to get: Pn - nsquared = Pa - a
Factorise both sides to get: n(p-n) = a(p-1)
Divide both sides by (p-1)
This gives: n(p-n)/(p-1)=a

Therefore: a = n(p-n)/(p-1)

[helen]

that works bob, but wasnt the question P = (n squared - a squared) / (n - a)

[Super Andy]

yea, helen's right, u've got the question wrong bobby

[m4rk]

that works bob, but wasnt the question P = (n squared - a squared) / (n - a)

a=P-n

because,

(n squared - a squared) = (n+a)(n-a)

then the (n-a)'s cancel so P=n+a, rearrange for a=P-n

[helen]

so simple...d'oh why did i not see that?

[bob h]

that works bob, but wasnt the question P = (n squared - a squared) / (n - a)

I'm really not sure what the question was now

This link seems to support my theory http://www.thestudentroom.co.uk/showthread.php?t=238391&page=4

But then again what does it matter. I won't be seeing my exam paper again.

[Fratello de Pingu]

I've finished exams now. I now get a free week with not much to do.

[bedders]

I should legally be dead. I have a horrific cold and have just 5 hours of exam in one day. I want to die.