OCR MEI FP1 May 18th 2012 PRE/POST DISCUSSION!

I found the proof by induction one really easy, it was pretty much the same as Jan 08 - http://www.mei.org.uk/files/papers/fp108ja_sw19.pdf

Hopefully, some people will have thought it was a sum and bring the grade boundaries down as a result :P

Reply 41

commanderb

anyone get a=2, p=-28, q=33, for the roots question?

Reply 42

Silent--ly

Original post by commanderb

anyone get a=2, p=-28, q=33, for the roots question?

Yes, I did. But was there any particular reason why you just went down the entire page and negged practically everyone?

Reply 43

TimetoSucceed

7

Original post by commanderb

anyone get a=2, p=-28, q=33, for the roots question?

if thats question 3, i think one of my values was 10, i plugged all my values into the equation after to check and they equalled 0 as the equation specified.

Reply 44

Bobilina

12

The most disgusting thing is, the re-sit will be on the same day as C3 in January, it always is..

Reply 45

i:need to get real

Somehow managed to get p=-30 not -33 for the roots question, don't know how that happened :confused:

Also, did the proof by induction question seem suspiciously easy to anyone else?

Reply 46

NJam

2

Original post by commanderb

anyone get a=2, p=-28, q=33, for the roots question?

I'm sure the question was:

3x^(3) + 8x^(2) +px +q = 0

in which case, those values do not work.

The values:
a=2
p=-33
q=10

however, do work.

Thought the exam was really nice to be honest! Quite a contrast to NM..

Reply 47

TimetoSucceed

7

Original post by NJam

I'm sure the question was:

3x^(3) + 8x^(2) +px +q = 0

in which case, those values do not work.

The values:
a=2
p=-33
q=10

however, do work.

Thought the exam was really nice to be honest! Quite a contrast to NM..

exactly this

Reply 48

IChooseThisName

2

Original post by NJam

I'm sure the question was:

3x^(3) + 8x^(2) +px +q = 0

in which case, those values do not work.

The values:
a=2
p=-33
q=10

however, do work.

Thought the exam was really nice to be honest! Quite a contrast to NM..

This. I did it after C2 and found it easier. :colondollar:

Reply 49

NJam

2

I'm glad you both agree! Some of my friends didn't, I was beginning to worry that I'd made a mistake somewhere.

Reply 50

Loulybob

Just did this exam today and it was the exam I enjoyed the most out of the 3 I did today (C2, FP1 and ELEC2). I haven't found any mistakes yet when I've talked with the others who did it and I checked a lot of stuff using my calculator so I'm feeling pretty confident :smile:

Reply 51

Cpb95

Original post by IChooseThisName

This. I did it after C2 and found it easier. :colondollar:

It was way easier than C2

Reply 52

skibur

12

Is there going to be a unofficial mark scheme for this?

Reply 53

skibur

12

Does anyone know if you can drop marks for proof by induction terminology? like if the way you set it out was not as the mark scheme wanted?

Reply 54

uttamo

10

Original post by skibur

10 divided by something :smile:

Original post by Silent--ly

I can't remember, but something like 10/63? :dontknow:

10/63 is what I got yeah

Reply 55

uttamo

10

What did people get for that weird question about complex numbers that asked why alpha, beta and origin lie on the same line on an Argand diagram? Or something like that...

I put it's because they alpha and beta have the same arguments and they both go through origin so they're on the same line. But I'm not sure as I feel I may have misunderstood the question.

Reply 56

skibur

12

Original post by uttamo

What did people get for that weird question about complex numbers that asked why alpha, beta and origin lie on the same line on an Argand diagram? Or something like that...

I put it's because they alpha and beta have the same arguments and they both go through origin so they're on the same line. But I'm not sure as I feel I may have misunderstood the question.

Pretty much the same, think I overdid it a bit, I said the arguments were the same, therefore it was a straight line between the two points

Then I wasnt sure if that was enough so I found the equation between the two points y=root3x +C, then plugged the coordinates of my points in and C=0! so therefore it went through the origin.

My teacher said what you said though; so maybe mine was an overkill...

Reply 57

Sokka

2

Original post by skibur

Pretty much the same, think I overdid it a bit, I said the arguments were the same, therefore it was a straight line between the two points

Then I wasnt sure if that was enough so I found the equation between the two points y=root3x +C, then plugged the coordinates of my points in and C=0! so therefore it went through the origin.

My teacher said what you said though; so maybe mine was an overkill...

it was 1 mark dude... 1 MARK!!

Reply 58

Loulybob

Original post by uttamo

What did people get for that weird question about complex numbers that asked why alpha, beta and origin lie on the same line on an Argand diagram? Or something like that...

I put it's because they alpha and beta have the same arguments and they both go through origin so they're on the same line. But I'm not sure as I feel I may have misunderstood the question.

I put something similar to this, I don't think you misunderstood the question as I think it was as straightforward as that. I think it was only 1 mark anyway so it wasn't looking for anything fancy :wink: