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Edexcel FP3 - 27th June, 2016 watch

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    (Original post by DylanJ42)
    Hey guys, I hope FP3 is going good for everyone, I have a question about matrices and inverses;

    I have a query about Question 1b

    Here is my working (I am aware simult equations is the best method, however what is wrong with the method i used)

    I am assuming, bar some silly arithmetic error, that this is wrong because the inverse of the inverse of a transformation doesn't give you the transformation itself ie  (T^{-1})^{-1} \neq T , if this is the case, could someone please explain why

    Thanks
    Sorry but that is true. Shud be equals not =/=
    If T is a square matrix and not singular ofcourse.
    (A)(A)^-1=A^-1(A)=I
    Note (AB)^-1=B^-1A^-1 *

    Now (AA^-1)^-1=I^-1=I
    (AA^-1)^-1= (A^-1)^-1(A^-1)=I
    (A^-1)^-1(A^-1)(A)=IA=A
    (A^-1)^-1=A qed




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    (Original post by physicsmaths)
    Sorry but that is true. Shud be equals not =/=
    If T is a square matrix and not singular ofcourse.
    (A)(A)^-1=A^-1(A)=I
    Note (AB)^-1=B^-1A^-1 *

    Now (AA^-1)^-1=I^-1=I
    (AA^-1)^-1= (A^-1)^-1(A^-1)=I
    (A^-1)^-1(A^-1)(A)=IA=A
    (A^-1)^-1=A qed

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    I originally assumed equals, but due to my answer being wrong and finding no mistakes in my workings I thought it must be "not equals", thank you for clearing it up though

    Very impressive :chaplin:
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    (Original post by 13 1 20 8 42)
    I looked at the simultaneous equations and got to z coordinate -(15/4)t with that as well, maybe an error in the answers?
    Let's go with that :laugh: Thank you for your help
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    Not looking forward to this
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    I'm noticing that on the edexcel website both the FP2 and FP3 papers from pre 2008/2009 have (legacy) beside them. What does this mean? thanks
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    (Original post by DylanJ42)
    I'm noticing that on the edexcel website both the FP2 and FP3 papers from pre 2008/2009 have (legacy) beside them. What does this mean? thanks
    Probably that they are based on the old P5/P6 syllabus
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    Self teaching myself FP3. Anyone know of any good FP3 textbook?
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    (Original post by shamika)
    Probably that they are based on the old P5/P6 syllabus
    Ah okay, how much of the p5/p6 content overlaps with the fp2/fp3 content? Is there enough of an overlap to use the legcay papers as proper past papers, or will it just be a case of picking the odd question from them?
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    (Original post by kkboyk)
    Self teaching myself FP3. Anyone know of any good FP3 textbook?
    can you make it Kel?
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    (Original post by DylanJ42)
    Ah okay, how much of the p5/p6 content overlaps with the fp2/fp3 content? Is there enough of an overlap to use the legcay papers as proper past papers, or will it just be a case of picking the odd question from them?
    I believe it's nearly identical except P5 had intrinsic coordinates which was needed in M6. If you give me a link to the legacy papers I can tell you for sure.
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    (Original post by DylanJ42)
    Ah okay, how much of the p5/p6 content overlaps with the fp2/fp3 content? Is there enough of an overlap to use the legcay papers as proper past papers, or will it just be a case of picking the odd question from them?
    I have the P5/6 books so.
    P5
    Hyperbolic functions(FP3)
    Differentiation(hyperbolic FP3 stuff)
    Integration (hyperbolic FP3 stuff)
    Coordinate systems(FP3)(one extra thing is intrinsic coordinates and radius of curvature)
    P6
    Maclauring taylor(Fp2)
    Complex numbers (FP2)
    Matrix algebra(FP3)
    Vectors(FP3)
    Numerical methods(FP2)
    Proof(induction etc)
    So P5/6 extremely helpful for FP2/3. I woukd just do the 'Old papers pack' on physicsandmathstutor which have like 100 old questions. Then do all papers including R/IAL.


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    (Original post by kkboyk)
    Self teaching myself FP3. Anyone know of any good FP3 textbook?
    Edexcel one is really good tbh.


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    (Original post by Proxenus)
    can you make it Kel?
    Almost finished with all my Mahs modules.

    (Original post by physicsmaths)
    Edexcel one is really good tbh.


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    Thanks. I'll try it.
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    Just starting Fp3. Hopefully I can finish Matrices and make a decent start on vectors this week. I recall finding vectors difficult.

    Hopefully it sticks.
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    (Original post by shamika)
    I believe it's nearly identical except P5 had intrinsic coordinates which was needed in M6. If you give me a link to the legacy papers I can tell you for sure.
    I think physicsmaths has cleared it up, thank you anyway Also M6 meaning mechanics 6? :eek: why was it removed?

    (Original post by physicsmaths)
    I have the P5/6 books so.
    P5
    Hyperbolic functions(FP3)
    Differentiation(hyperbolic FP3 stuff)
    Integration (hyperbolic FP3 stuff)
    Coordinate systems(FP3)(one extra thing is intrinsic coordinates and radius of curvature)
    P6
    Maclauring taylor(Fp2)
    Complex numbers (FP2)
    Matrix algebra(FP3)
    Vectors(FP3)
    Numerical methods(FP2)
    Proof(induction etc)
    So P5/6 extremely helpful for FP2/3. I woukd just do the 'Old papers pack' on physicsandmathstutor which have like 100 old questions. Then do all papers including R/IAL.

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    Wow they are almost identical Are the R papers more difficult or is that just a myth I've heard somewhere?
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    (Original post by physicsmaths)
    I would just do the 'Old papers pack' on physicsandmathstutor which have like 100 old questions.


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    It would be nice if physicsandmathstutor acknowledged the efforts of Graham from Edexcel in putting these packs together.

    Likewise the Gold papers etc.
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    I haven't started on matrices yet, and I'll be needing to revise vectors as well. Can anyone tell me what the matrices chapter is like? Seems a little drab.
 
 
 
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