Edexcel FP2 Official 2016 Exam Thread - 8th June 2016

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Im a little stuck here guys. How do we answer transformation questions that involve arg (z-z1)= angle

Generally write z in terms of w, then sub that into arg(z-z1) = angle. Should be fine as long as you remember how arguments work (e.g. arg(z1/z2) = arg(z1) - arg(z2) etc)

Original post by Rkai01

On a shading question like where you shade the region for which say | Z | < x which has been transformed can you use a pencil to change the equal signs to inequality signs on part b and then state in part c refer to pencil inequalities or something?

I think it would probably be better to rewrite it out than change work you've already done.

Reply 1141

mathsmann

Hi guys, can someone help me out june 2014 (R) , In question 7b i found the theta values but i dont get why some of the values are the same, so are you meant to just carry on until you get 5 x values?? Thanks

Reply 1142

Cpj16

Predictions for the paper tomorrow

and any useful tips?

Reply 1143

oinkk

Original post by Cpj16

Predictions for the paper tomorrow

and any useful tips?

Tangents to polar curves haven't came up in a while.

Reply 1144

Anon-

guys, could someone please explain the questions where they ask you to shade the area after a transformation in the complex plane? June 2009 6b or June 2015 5b for example

Reply 1145

Nirm

Anyone know a clear solution for question 4 part B of the June 2015 paper? The question seems really confusing and I don't really understand arsey's working and can't find the official mark scheme either.

Reply 1146

Inges

Original post by ViKZZ

Had a quick question, in FP2 June 2015, how do you know the answer to 1b? The answer is apparently x>1 however I dont understand how we're just meant to see that since it is a 1 mark question.

If you use the value's you got from part a and put them into the new equation, the LHS will be smaller than the RHS but the equation will say its bigger, which is wrong. However with x=1 the equation is correct which leaves that as the only correct answer.

https://www.youtube.com/watch?v=hOxtcUJa1J4

I understood after this guy explained it.

Reply 1147

Inges

Original post by Nirm

http://qualifications.pearson.com/content/dam/pdf/A-Level/Mathematics/2013/Exam-materials/6668_01_msc_20150812.pdf

Official mark scheme

Reply 1148

ImJared

Original post by Cpj16

Predictions for the paper tomorrow

and any useful tips?

There aren't too many chapters, but here is my prediction based on previous years (in order of question number):

Partial Fractions (Usually starts with this)

Inequalities (Or this, near the beginning)

First Order Differentials (Probably relatively easy)

Polar Coordinates (Finding the area of a region)

Transformations (Harder than last year)

De Moivre's Theorem Proof (The standard routine)

Argand Diagram Arcs (Hasn't appeared on many papers)

Second Order Differentials (Something with trig functions)

I could be completely off but proofs haven't appeared much over the past few years so I am expecting one of those to pop up for sure. It is mostly simple proof by induction so will only throw people off if they haven't done their studying.

(edited 7 years ago)

Reply 1149

edothero

Original post by ImJared

There aren't too many chapters, but here is my prediction based on previous years (in order of question number):

Partial Fractions (Usually starts with this)

Inequalities (Or this, near the beginning)

First Order Differentials (Probably relatively easy)

Polar Coordinates (Finding the area of a region)

Transformations (Harder than last year)

De Moivre's Theorem Proof (The standard routine)

Argand Diagram Arcs (Hasn't appeared on many papers)

Second Order Differentials (Something with trig functions)

No series? :tongue:

Reply 1150

Euclidean

The Maclaurin series of a function is just the Taylor expansion of the function with x_0 = 0 right?

Reply 1151

khaleesi98

Original post by mathsmann

Yeah that's it, just carry on until you have 5 different x values

Reply 1152

edothero

Original post by Euclidean

The Maclaurin series of a function is just the Taylor expansion of the function with x_0 = 0 right?

f(0) + f'(0)x etc

Reply 1153

Euclidean

Original post by edothero

f(0) + f'(0)x etc

Cheers, just wanted to clarify

Reply 1154

ImJared

Original post by edothero

No series? :tongue:

Probably on the first question, but something simple. They had a tough series question last year so I don't think they'll repeat anything similar.

Reply 1155

Chirstos Ioannou

Original post by ImJared

There aren't too many chapters, but here is my prediction based on previous years (in order of question number):

Partial Fractions (Usually starts with this)

Inequalities (Or this, near the beginning)

First Order Differentials (Probably relatively easy)

Polar Coordinates (Finding the area of a region)

Transformations (Harder than last year)

De Moivre's Theorem Proof (The standard routine)

Argand Diagram Arcs (Hasn't appeared on many papers)

Second Order Differentials (Something with trig functions)

What proofs do we have to know?

Reply 1156

khaleesi98

Original post by Euclidean

The Maclaurin series of a function is just the Taylor expansion of the function with x_0 = 0 right?

Yes. Also, if like me you forget which is which, you can normally tell from the question (it asks for up to x^3 instead of (x - a)^3 ☺️)

* Oops didn't realise you'd already got a reply

(edited 7 years ago)

Reply 1157

economicss

Please could anyone do a worked solution for question 12a https://8dedc505ac3fba908c50836f59059ccce5cd0f1e.googledrive.com/host/0B1ZiqBksUHNYdHIxUkJmdndfMlE/June%202004%20QP%20-%20FP2%20Edexcel.pdf I've tried it by substituting in for lambda plus lambda i when x is greater than 0 but for some reason I can't get it to work but I thought the method was correct? Thanks :smile: