FP2 MEI OCR Official Thread - 23rd June 2014

Original post by Political Cake

Haha who is knowing that? :wink:

Besides, I'm certainly not. I avoided doing this one last year and it's the only module I've had to teach myself over this year so I anticipate doing far better in the other modules, my aim for this one is solely to make up the numbers for an A overall. :colondollar:

I'm sure you'll do far better anyway..! :tongue:

Seen on you on other threads you seemed confident :P

Reply 183

username1256732

Original post by JackVM

That f***ing complex number question. I knew how to do it (making the denominator real in the C+jS bit) but I didn't have time, as the only method I could see involved a considerable amount of algebra.

The hypobolic functions - let 2x=5coshu bit wasn't pretty either, I got half of the final equation right, but not the other half.

Neither did I :'(

Reply 184

Keep Up

Original post by dada55

Unfortunately you made the same mistake as me, remember that the area of a polar curve is r^2/2 so we had to integrate (2x)^2/2

yeah ofcourse!! No idea why i integrqted like a cartesian curve :L

Reply 185

Original post by WinOrDie

Same needed an a* dont think i got it so :frown:

Cheer up :P at least it's all over now (I'm presuming this was your last exam) besides A in FP2 is still quite an impressive feat :smile:

Reply 186

Political Cake

6

Original post by WinOrDie

Seen on you on other threads you seemed confident :P

Yes, very confident on others but FP2 is frankly death to me..! :biggrin:

Original post by JackVM

(I'm presuming this was your last exam)

Hah, all the invigilators were practically packing all the exam related notices away while were were close to finishing the exam... :tongue:

It was rather distracting, actually. :mad:

(edited 9 years ago)

Reply 187

Illiberal Liberal

Original post by mathematigeek

Yea I've done really badly (just no where near well enough). It wasn't due to lack of knowledge though, it was just me letting personal problems get in my way. There was just no need to be so overconfident and knock the rest of us down :/ it's a lot harder than past papers :/

I agree that it was a harder paper than usual! :redface:

I messed up the area for the polar coordinates because I did normal integration the small angle approximation threw me :frown:

I think a lot of people would have messed up the hexagon question and the eigenvectors, and let's not talk about the hyperbolics question... :afraid:

Reply 188

username1256732

Original post by Law-Hopeful

I agree that it was a harder paper than usual! :redface:

I messed up the area for the polar coordinates because I did normal integration the small angle approximation threw me :frown:

I think a lot of people would have messed up the hexagon question and the eigenvectors, and let's not talk about the hyperbolics question... :afraid:

YEa, I really think it was.
So did I! Feel like such an idiot now I know how simple it was :frown:

the hyperbolics was just awful. And riven vectors catches people out all the time.

Idk how to feel :frown:

I'm glad my exams are over but I'm gutted with how it went :frown:

Reply 189

Original post by mathematigeek

Yea I've done really badly (just no where near well enough). It wasn't due to lack of knowledge though, it was just me letting personal problems get in my way. There was just no need to be so overconfident and knock the rest of us down :/ it's a lot harder than past papers :/

Same story here. I don't think I did bad exactly, probably a high B/low A but there is absolutely 0 chance of me getting the A* I needed for my firm.

Maybe the grade boundaries will be low eh? :smile:

Reply 190

username1256732

Original post by JackVM

Same story here. I don't think I did bad exactly, probably a high B/low A but there is absolutely 0 chance of me getting the A* I needed for my firm.

Maybe the grade boundaries will be low eh? :smile:

I've done a lot worse than that :/ m sorry to hear that :/ I guess we just have to wait and see now :frown:

I hope you do well

Reply 191

Original post by Political Cake

The mean for an A on the modern MEI FP2 is 55.4, but it's evident in more recent years people are better prepared for it and have scored, on average, higher than say between 2006-2010.

Yes, I excluded some of the older papers when I worked it out for that reason.

Reply 192

Original post by mathematigeek

I've done a lot worse than that :/ m sorry to hear that :/ I guess we just have to wait and see now :frown:

I hope you do well

Thanks, I hope you do well too. It's probably not as bad as you think, just try to forget about it and deal with any fallout when you know what the grades are, not before. At least it's over now, we never have to go to an FP2 lesson again.

Reply 193

Political Cake

6

The show that questions...

1) a) Given x=arccos(x), show that dy/dx = -1/√{1-x²)

=>

x = cos(y)

=>

\frac{dx}{dy} = -sin(y)

=>

\frac{dy}{dx} = \frac{-1}{sin(y)}

Now,

sin^2(y) = 1 - cos^2(y)

So,

sin(y) = \sqrt{1 - cos^2(y)}

=>

\frac{dy}{dx} = \frac{-1}{\sqrt{1 - cos^2(y)}}

=>

\frac{dy}{dx} = \frac{-1}{\sqrt{1 - x^{2}}}

4) a) Given sinh(y)=x; show that y=ln(x+√(x²+1))

=>

x = \frac{e^y-e^{-y}}{2}

=>

2x = e^y-e^{-y}

=>

2xe^y = e^{2y}-1

=>

e^{2y}-2xe^y+1=0

=>

e^y=\frac{2x\pm \sqrt{4x^2+4}}{2} = \frac{2x\pm 2\sqrt{x^2+1}}{2} = x\pm \sqrt{x^2+1}

=>

y=ln(x\pm \sqrt{x^2+1})

However,

x - \sqrt{x^2+1} <0

so reject negative root.

=>

y=ln(x + \sqrt{x^2+1})

Reply 194

Illiberal Liberal

Original post by mathematigeek

YEa, I really think it was.
So did I! Feel like such an idiot now I know how simple it was :frown:

the hyperbolics was just awful. And riven vectors catches people out all the time.

Idk how to feel :frown:

I'm glad my exams are over but I'm gutted with how it went :frown:

Same, but if you say r=2theta that should get a mark (I hope!).

For the hyperbolics the last question was similar to some that have come up before, but I still couldn't do it. I couldn't get the second part of the ln! :frown:

Just chill and be happy your exams are over! There's nothing you can do now I'm sure you did better than you thought! :smile:

Reply 195

Political Cake

6

Original post by JackVM

Yes, I excluded some of the older papers when I worked it out for that reason.

Who knows! We can hope that the majority have regressed a few year. A world cup here, january exams vanishing over there... we can hope..! :smile:

Reply 196

Original post by Political Cake

Who knows! We can hope that the majority have regressed a few year. A world cup here, january exams vanishing over there... we can hope..! :smile:

That's a very good point actually, I forgot most people are doing loads of exams this summer (I'm only taking two subjects, so it's been normal for me)
Fingers crossed for low grade boundaries :smile:

Reply 197

Eeeveon

The exam was okay, I felt like I knew how to do everything, except it didn't have enough time to write it all down D: I needed an A* but I think I've already lost at least 7 marks just from not having enough time, if only exam papers could read your mind! I guess I'll have to try and make it up with Step 2 this Thursday (cries inside).

Reply 198

Rex Regum

5

The question 'prove r increases as theta increases' , how many marks was it? and can someone please show me how they did it.

Reply 199

Illiberal Liberal