[Astonix]

How did everyone find today's paper? I thought it was really quite different to previous papers, but not too bad overall as long as you knew your stuff.

I have for once taken the paper away with me so might be able to help with the answers / write up an unofficial markscheme, though will need the help of others for answers as I'm not too sure about some of them.

I messed up on 1b) because I rushed it. I wrote the integral of e^3 as e^3 / 3 instead of e^3x. Might still get a method mark for splitting the integral up though.

[radardetector]

(Original post by Astonix)
How did everyone find today's paper? I thought it was really quite different to previous papers, but not too bad overall as long as you knew your stuff.

I have for once taken the paper away with me so might be able to help with the answers / write up an unofficial markscheme, though will need the help of others for answers as I'm not too sure about some of them.

I messed up on 1b) because I rushed it. I wrote the integral of e^3 as e^3 / 3 instead of e^3x. Might still get a method mark for splitting the integral up though.

would it not be just splitting the integral to e^3 x e^x^2 and then taking e^3 out because its just a number the doing e^3 x the integral of e^x^2?

[Astonix]

(Original post by radardetector)
would it not be just splitting the integral to e^3 x e^x^2 and then taking e^3 out because its just a number the doing e^3 x the integral of e^x^2?

Yer, I think you can do that too.

[jacery1]

Overall i found the paper pretty easy, the way they set the questions was different to before but as you said if you knew your stuff it was pretty straight forward. the only one that there me slightly was question 9. Other than that happy .

[i-pex]

What did people get for the stationary point, f^-1(x) and d2y/dx2? I got (-1, 8) for the point and 1/(cos(at))^3 for the second derivative.

[Ryan44]

I felt it went pretty good, they included some odd arrangements especially with the counter example, although I used 2 different value for each variable.

Q10 was easy although I dropped a mark by not putting +- 2

Q9b (i) was the only real one I considered having a problem with, for some reason i couldn't get x by on its own as it was multiplying the y, if only i'd take x out as a common factor -.-

Q1b i didn't have a clue to do, should have practiced them style questions in hindsight, I added 3 to the answer for part a haha :P

[idigdn91]

i got the stationary point as (-1/2, 8) :/

[clubs93]

Yeah i got (-1/2,8) as well. what was the differential of 5x^2sin-1?

[EMPStudent]

I thought that was a horrible paper!

[EMPStudent]

Do you guys think the boundary will go down for an A? I hope so.

[zaidf]

(Original post by Biffmanz)
.

Biffmanz loved it.

[idigdn91]

for finding an expression for f^-1 my x values cancelled which i know isn't right, what did people get? :/

[ThreeCheers]

(Original post by radardetector)
would it not be just splitting the integral to e^3 x e^x^2 and then taking e^3 out because its just a number the doing e^3 x the integral of e^x^2?

Yeah, that's what I did, so you just multiplied e^3 by your answer for a, right?

(Original post by idigdn91)
for finding an expression for f^-1 my x values cancelled which i know isn't right, what did people get? :/

I got f^-1(x)= negative root of (3-5x/x-1) ??


What did everyone get as the Range of f in question 9?

[idigdn91]

i got something like 1, 3/5

[Ryan44]

(Original post by clubs93)
Yeah i got (-1/2,8) as well. what was the differential of 5x^2sin-1?

Product Rule, let u=5x^2 v=sin^-1x

[Ryan44]

(Original post by ThreeCheers)
Yeah, that's what I did, so you just multiplied e^3 by your answer for a, right?



I got f^-1(x)= negative root of (3-5x/x-1) ??


What did everyone get as the Range of f in question 9?

I think I had [0.6,1) as the range, as the f(x) was (x^2+3)/(x^2+5) and the domain was [0, infinity)

[radardetector]

what did everyone get for the parametric question, i got like -tanx (or whatever the variables were? also what about the proof for counter example. i put feta = 90 and alpha = 270 and got it i think - didnt get it till the last minute though!

[Ryan44]

(Original post by radardetector)
what did everyone get for the parametric question, i got like -tanx (or whatever the variables were? also what about the proof for counter example. i put feta = 90 and alpha = 270 and got it i think - didnt get it till the last minute though!

for the parametric i think if i remember correctly I had -atanax or something similar to that.. for counter example i put theta=0 and the other one equal to 5, both of the equations were proven wrong so i'm guessing I did the question right!

[radardetector]

(Original post by ThreeCheers)
Yeah, that's what I did, so you just multiplied e^3 by your answer for a, right?



I got f^-1(x)= negative root of (3-5x/x-1) ??


What did everyone get as the Range of f in question 9?

yeah i did

[radardetector]

yeah i had that for parametric!

for counter example did you got have to make it so the answers for sin came out the same with the two constants, but the answers for cos to be different?