Edexcel FP2 Official 2016 Exam Thread - 8th June 2016

Hey guys, just to clarify (or to be corrected), to get an A* in FM do you need to average 90 UMS across 3 of 4 A2 units, and then average 80 UMS across all the units in total? (6)

Thanks

Regarding the hint in the question attached, how would you determine to have t^3 in the P.I. instead of t^2 or t^1?
What from the C.F. indicates that it should be this way?
Thanks.

Haven't actually tried it, but surely a sketch and some basic GCSE geometry should get you the answer?

Please can anyone explain question 28b here https://8fd9eafbb84fdb32c73d8e44d980d7008581d86e.googledrive.com/host/0B1ZiqBksUHNYTnpyeF8xQlZweHc/REV1.pdf how do we work with the 3 to the power r? Thanks

How about the other questions?

Multiply the terms by the 1/3^r

For example, for r=1 it's
$(\frac31 - \frac12)\frac13 = \frac33 - \frac16$

Thank you, I've done parts a and b now, please could you explain, I've found that the radius is root6 but not sure whether this is right? And how do I find the coordinates of the centre from here please? Thanks

r= root2
you have 4 complex numbers which I will show in (x,y)=(real,imaginary)
(-root3,0) (-1,0) (0,1) (0,root3)
Then you can make 4 equations for the circle with this information but you only need 3 equations. If you need me to, I will go through this whole question with you but I'll let you have a go first.

Hallelujah I've finally got it! Thanks so much for all your help and patience

Hello, I don't understand the answer to this question. The answer is r=(2/9)root6cosectheta but I don't understand why you need the cosectheta bit since you know what sintheta is. Couldn't you just sub that in and get r=some constant? Because there's only one point where the line is parallel to the initial line.

Please can someone explain how to use the decomposition method for integrals, like how it is used in question 31 here http://madasmaths.com/archive/maths_booklets/further_topics/integration/1st_order_differential_equations_substitutions.pdf Thanks

Should I use a compass in the exam for drawing circles and stuff, like for complex loci and some polar curves? as I'm not the greatest at sketching but would I get marked down for this because its an accurate drawing and not a sketch?

You won't get marked down.

That said, I use a compass anyway because it helps me understand what's going on better if I have a clear picture. It's always good to have neat diagrams, it saves you from having to visualise things in your head.

do you have any other examples of questions like this where you need to find equations of lines? thanks very much

Please can someone explain how to use the decomposition method for integrals, like how it is used in question 31 here http://madasmaths.com/archive/maths_booklets/further_topics/integration/1st_order_differential_equations_substitutions.pdf Thanks