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# Edexcel P2 After-test Discusion watch

1. lol, science is good though to learn just rubbish do like stupid exams on it!

maths is good but p3 was a bit much... i was surprised i didnt learn how to integrate myslef because i seemed to integrate everything else in the world
2. strange thing is, i'm probably the only person that did better in p3 than p2 because i revised p3 for 2 weeks and got really into it as it was on it's own near the start whereas with p2 i only revised yesterday... only definitely lost 5 marks though, so went alright
3. i was surprised i didnt learn how to integrate myslef because i seemed to intergrate everything else in the world
Hey it gets better. A P5 question today was
4. Erm for all those who say theres not going to be many taking for the first time - there will be plenty, loads of schools do P1 M1 S1 in yr 12 and then P2 P3 M2 in the summer of year 13

For those of you that needed the first trig proof:

Using Cos(A + B) = CosACosB - SinASinB

Sub B for A: Cos(A + A) CosACosA - SinASinA
Cos2A = Cos²A - Sin²A

Using Sin²A + Cos²A ≡ 1
Cos²A = 1 - Sin²A

Cos2A = 1 - Sin²A - Sin²A
Cos2A = 1 - 2Sin²A
5. yeh, well i would do better at futher maths than some people in my school that chose to do it but i had more sense... (am still putting off revising biology for tomorrow - so hard to motivate myself to work in this heat)

there were some unhappy faces after that p5 exam which contrasted the after p2
6. (Original post by Revenged)
yeh, well i would do better at futher maths than some people in my school that chose to do it but i had more sense... (am still putting off revising biology for tomorrow - so hard to motivate myself to work in this heat)

there were some unhappy faces after that p5 exam which contrasted the after p2
Heh, I have biology too - AQAB modules 4 and 5. Good luck.
7. [QUOTE=Gaz031]
Q4(a)Proof
(b)f^-1(x)=(x+2)/x.
(c)2

QUOTE]

Thanks very much for putting the answers up.. very helpful ...for 4c though I think it was ±2 because was the x²=4....
8. can anyone remember the question 8.b) iii) a proof i think
9. it was ±2 because was the x²=4....
Agreed!
10. (Original post by tobyclark)
can anyone remember the question 8.b) iii) a proof i think
Prove
11. (Original post by Gaz031)
Prove
thank you
12. can someone go through the 2nd and 3rd part of the functions q please

find f^-1 and fg(x)=1/4
13. Fairly easy paper i thought - no questions that haven't appeared in other papers under one guise or another. Took me until five minutes before the end, but i was taking it easy. P'raps the trig identities were a little challenging, but as a resit after P3 it was so simple.

Has anyone here NOT taken this exam as a resit?
14. (Original post by chats)
can someone go through the 2nd and 3rd part of the functions q please

find f^-1 and fg(x)=1/4
What were f(x) and g(x) then? I have a terrible memory for specific questions.
15. (Original post by CrazyChemist)
Fairly easy paper i thought - no questions that haven't appeared in other papers under one guise or another. Took me until five minutes before the end, but i was taking it easy. P'raps the trig identities were a little challenging, but as a resit after P3 it was so simple.

Has anyone here NOT taken this exam as a resit?
This is my first time sitting the exam, though i knew the content by last July.
16. Yay! It was soooooooooo easy!

From the answers on here i've got 72 out of 75. I dropped 2 marks on the amount of water going past the river thingy. and one mark on the first part of the trig as i got 1/3rt3 but no -ve sign.

I reckon grade boundary for an A will be about 66/75 what do others think??
17. (Original post by CrazyChemist)
What were f(x) and g(x) then? I have a terrible memory for specific questions.
f(x) was 2/1+x I think

what would the inverse be?

g(x) was x²-3 I think
18. (Original post by chats)
f(x) was 2/1+x I think

what would the inverse be?

g(x) was x²-3 I think
I thought f(x) was 2/x-1 so inverse was: (2/x) +1 If i remember correctly?
19. (Original post by !Laxy!)
I thought f(x) was 2/x-1 so inverse was: (2/x) +1 If i remember correctly?
ye i think so cept i got inverse = 2/(x+1)
20. (Original post by !Laxy!)
I thought f(x) was 2/x-1 so inverse was: (2/x) +1 If i remember correctly?
oh yeh sorry f(x) was 2/x-1

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