[Maths HELP!] Factorising...

[leonheart_a]

For A level im hopefully doing:
ICT
Art
Photography
Psychology

I just hope i get my 5 A*-C grades so i can get into sixth form

 

[Calafas]

Haha, you can get them easy. You dont need specific grades for my Sixth Form, with the one exception of you have to have a B in Maths GCSE to be able to do maths...

 

[Agjsdfd]

ICT, Art, Photography => Good combi.
but why psychology? Involves hell a lotta english stuff. Do something easy.

 

[leonheart_a]

Yeah thats the same for our maths to. Im so happy that i have no more maths...ever!
Well im off to bed now, gotta be awake for tommorow

Good luck you guys!

 

[Agjsdfd]

Yah,
good luck guys.

(Cant believe that maths help topic turned into chatting. LOL)

 

[Calafas]

Haha, yeah, i'm off too, need an early night and all, but will probably not be able to sleep and end up playing Speed Racer or something XP


G'luck everyone with exams tomorra

 

[Man18]

If N = pq with p and q primes
then phi(N) = (p - 1)(q - 1)

phi(N) = (p - 1)(q - 1) = pq + 1 - (p + q)

A = N + 1 - [3/sqrt(2)] sqrt(N)
A = pq + 1 - [3/sqrt(2)] sqrt(pq)

phi(N) > A p + q < [3/sqrt(2)] sqrt(pq)
2p² + 4pq + 2q² < 9pq
2p² - 5pq + 2q² < 0
(2p - q)(p - 2q) < 0

it's true because p > q thus 2p - q > 0
and p < 2q thus p - 2q < 0


B = N - 2sqrt(N) = pq - 2sqrt(pq)

phi(N) < B 1 - (p + q) < - 2sqrt(pq)
p + q - 2sqrt(pq) > 1
[sqrt(p) - sqrt(q)]² > 1
sqrt(p) - sqrt(q) > 1 (because p > q)

N >= 6 (for p = 3 and q = 2)
then p - q > 6^(1/4) > 1.5
p > q + 1.5
sqrt(p) > sqrt(q + 1.5) > sqrt(q) + sqrt(1.5) > sqrt(q) + 1

thus sqrt(p) - sqrt(q) > 1 and phi(N) < B

and

A < phi(N) < B


taken from yahoo

 

[DarkRey]

hurrey, maths was easy but couldn't answer 2/3 questions.
had english now and it was easy too , it was about adverts and news articles.
tomorrow i have ict is gonna be the easiest gcse exams dont need to revise.

 

[Calafas]

I had english today, it was about some woman having a go at kids today for wasting too many resources, then about a swede

And my history was easy, but by 3:00, after 3 and 3/4 hours of exams, my hand cramped well bad

 

[Agjsdfd]

If N = pq with p and q primes
then phi(N) = (p - 1)(q - 1)

phi(N) = (p - 1)(q - 1) = pq + 1 - (p + q)

A = N + 1 - [3/sqrt(2)] sqrt(N)
A = pq + 1 - [3/sqrt(2)] sqrt(pq)

phi(N) > A p + q < [3/sqrt(2)] sqrt(pq)
2p² + 4pq + 2q² < 9pq
2p² - 5pq + 2q² < 0
(2p - q)(p - 2q) < 0

it's true because p > q thus 2p - q > 0
and p < 2q thus p - 2q < 0


B = N - 2sqrt(N) = pq - 2sqrt(pq)

phi(N) < B 1 - (p + q) < - 2sqrt(pq)
p + q - 2sqrt(pq) > 1
[sqrt(p) - sqrt(q)]² > 1
sqrt(p) - sqrt(q) > 1 (because p > q)

N >= 6 (for p = 3 and q = 2)
then p - q > 6^(1/4) > 1.5
p > q + 1.5
sqrt(p) > sqrt(q + 1.5) > sqrt(q) + sqrt(1.5) > sqrt(q) + 1

thus sqrt(p) - sqrt(q) > 1 and phi(N) < B

and

A < phi(N) < B


taken from yahoo

Cant remember having that in the exam o.o. Or was it?

Calafas, congrats. Painkillers?

I didnt find the english exam exam too hard.
And am not really worried about poetry, and section 2 of paper 2 will be piss easy, as it asks you to comment on something

 

[Calafas]

That maths thing lost me

And nah, it'll get better soon enough

And the English poems will be easy....just boring as hell. xP

 

[Agjsdfd]

LoL, yah.

I hope they ask you the same question in part b of the poetry exam.
I did 2 mock, and in both of the mocks they asked you to write about old memory. One was about how it made you feel proud(I wrote about bubble makers, where I was 7 years old, lol)
And on the other mock it was about memory that made you feel sad.(And I wrote a bunch of em, as it was just a mock...)

 

[Calafas]

If it asks me for any old memories or whatever, i'm gonna hafta b/s it, seeing as how i have a shit memory.

And I hate writing about that stuff.

But oh well, no exams tomorra

Just hafta revise for English on Thrusday. :/

 

[leonheart_a]

Man that english exam was a bitch ¬.¬.
I officlally hate poetry even more. Your lucky your english was easy

I think my media paper should be good though

 

[Agjsdfd]

If it asks me for any old memories or whatever, i'm gonna hafta b/s it, seeing as how i have a shit memory.

And I hate writing about that stuff.

But oh well, no exams tomorra

Just hafta revise for English on Thrusday. :/

Just make it up man

The examiners are not gonna check your bio data. lol

 

[Calafas]

The government has spies everywhere.

They might have some family home videos or something. >.>


But yeah, I will xD

 

[Agjsdfd]

Man that english exam was a bitch ¬.¬.
I officlally hate poetry even more. Your lucky your english was easy

I think my media paper should be good though

Dont worry, the media will be easy.
Just quick(spend 2 minutes) gap and list before answering the question:

G enre
A udience
P urpose

L anguage
I nformation
S tyle
T one