Edexcel FP2 Official 2016 Exam Thread - 8th June 2016

Reply 1980

Daym. Bater is real insight. I teach well.

Any unofficial mark schemes online?

I am scared of my method for 4 b). Everyone is talking of double IBP when I just solved the 1st order ODE like you normally do - auxiliary equation to find c.f and then p.i. Student did it by differentiating to get 2nd order and then finding c.f and p.i. Is that really necessary though? I swear in M5 you get to finding 1st order vector ODEs using my method. No idea why he thinks you need 2nd order to solve it.

Other than that, this was a pretty standard paper. I think 75/75, so that makes it pretty easy to meet my Further Maths offer. :smile:

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Reply 1981

coolguy123456

8

Original post by BlazingCharizard

p dx/dt + q = r

you forgot the x after q otherwise it wouldn't work..

Reply 1982

zhzstudent

1

for the first order integral question part b=====>> dy/dy + 2y = sin theta , if i used the limits to find that the constant c was equal to 1/5, and i got the rest right, but in the final working line, when stating the full y=, i put 1/5 instead of 1/5 e^(-2 theta) ,

would that only cost me one last accuracy mark ?!?

Reply 1983

coolguy123456

8

Original post by Pixel_Green

They gave you that x = 0 when t = 0 so you could find the value of c which was -r/q

Reply 1984

username1162972

18

Original post by Insight314

Any unofficial mark schemes online?

I am scared of my method for 4 b). Everyone is talking of double IBP when I just solved the 1st order ODE like you normally do - auxiliary equation to find c.f and then p.i. Student did it by differentiating to get 2nd order and then finding c.f and p.i. Is that really necessary though? I swear in M5 you get to finding 1st order vector ODEs using my method. No idea why he thinks you need 2nd order to solve it.

Other than that, this was a pretty standard paper. I think 75/75, so that makes it pretty easy to meet my Further Maths offer. :smile:

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Shw me ur method.

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Reply 1985

somevirtualguy

2

Original post by Student403

Yes that's exactly the combination I'm looking to have for an A*

90 average in FP2, M2, M3

And then S2, FP3, FP1 can be whatever

Ah I'm the same but hated stats so I chose D1 over S2

Reply 1986

Student403

19

Original post by somevirtualguy

Ah I'm the same but hated stats so I chose D1 over S2

I hate stats too :tongue:

I also take D1. I was hoping to knock off one of my M1 or S1 in my normal Maths A level with a good mark in D1 so that probably won't count towards FM

Reply 1987

Pixel_Green

2

Original post by coolguy123456

They gave you that x = 0 when t = 0 so you could find the value of c which was -r/q

In that case...

Reply 1988

EricPiphany

17

Just verify your solution works.
Or have you forgotten what it was...

Original post by Insight314

Any unofficial mark schemes online?

I am scared of my method for 4 b). Everyone is talking of double IBP when I just solved the 1st order ODE like you normally do - auxiliary equation to find c.f and then p.i. Student did it by differentiating to get 2nd order and then finding c.f and p.i. Is that really necessary though? I swear in M5 you get to finding 1st order vector ODEs using my method. No idea why he thinks you need 2nd order to solve it.

Other than that, this was a pretty standard paper. I think 75/75, so that makes it pretty easy to meet my Further Maths offer. :smile:

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Reply 1989

Zacken

22

Original post by somevirtualguy

So, just to on confirm (sorry I know you've been asked so many times), an average of 90% across M2, M3 and FP2 would be fine for an A*? I also do FP3, whether or not that makes a difference I've no idea.

That would be more than fine, yes.

Reply 1990

Insight314

7

Original post by physicsmaths

Shw me ur method.

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ImageUploadedByStudent Room1465405839.248518.jpg

Prove me wrong.

Pro-tip: You can't.

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Reply 1991

CALI1198

5

Did the inequality question have surd roots?

Reply 1992

PhysicsIP2016

2

Actually so relieved it is over because I at least know now that I cannot mess up FP3 if uni is still an option 😂😥

Reply 1993

username1162972

18

Original post by Insight314

Prove me wrong.

Pro-tip: You can't.

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Its fine lol. Nice one.

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Reply 1994

olliestav

are there any solutions anywhere?

Reply 1995

Insight314

7

Original post by EricPiphany

Just verify your solution works.
Or have you forgotten what it was...

Posted above m8.

How did you find it?

I bet the mandem down at STEP prep thread finished this paper in half the time.

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Reply 1996

edothero

OP

15

Original post by CALI1198

Did the inequality question have surd roots?

Yes.

(x+1)(x+2)(x^{2}-2)< 0

x^{4}

graph that intersects the x-axis at

x = -2, -\sqrt{2}, -1, \sqrt{2}

Draw the

x^{4}

graph and find where it is

< 0

(edited 7 years ago)

Reply 1997

Fbiemad

13

Original post by Pixel_Green

In that case...

I got the same as you. Is that correct?

Reply 1998

Insight314

7

Original post by physicsmaths

Its fine lol. Nice one.

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Told you m8. Doubting my maths skills. Now I can finally act like a proper lad and tell my friends it is a very easy paper.

Btw, is Student's method wrong then? It was posted a few pages back but he pretty much did the same think except differentiating the ODE at the start so he can get a 2nd order ODE. This makes him get a quadratic auxiliary equation, with roots 0 and -2, whereas my method only has one root which is -2. So his complementary function would be wrong.

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Reply 1999

CALI1198

5

Original post by edothero

Yes.

(x+1)(x+2)(x^{2}-2)< 0

x^{4}

graph that intersects the x-axis at

x = -2, -\sqrt{2}, -1, \sqrt{2}

Draw the

x^{4}

and find where it is

< 0

Thank god. I just saw someone talking about whole numbers for that one. Would have been dreadful if i didnt even get that.

How many marks would you drop on the method of differences Q if you coikdnt get past doing the whole r=1,2..n stuff?

Edexcel FP2 Official 2016 Exam Thread - 8th June 2016

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