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    (Original post by bwr19)
    Attachment 432421

    Could anyone explain how to do this question (part c)? I got 3.74 but the mark scheme says 3.61?
    Form a right angled triangle with PRN, the right angle of course being at N
    Use the dot product to find the cosine of the angle between PR and PN
    Then your distance RN is PRsin(theta) where theta is the (acute) angle you worked out
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    how do you verify a column vector is an eigenvector of a matrix?
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    (Original post by Ilovemaths96)
    how do you verify a column vector is an eigenvector of a matrix?
    If the matrix is A and the column vector is v, then Av=(correspondingeigenvalue)*v
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    (Original post by nayilgervinho)
    Can someone help me with 3b and 3c.

    https://3a14597dd5c7aa2363f067571766...%20Edexcel.pdf
    Did you get it in the end or are you still confused?
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    Anyone have any revision resources?
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    (Original post by ExMus)
    Anyone have any revision resources?
    TeeEm's resources.
    http://www.thestudentroom.co.uk/show...9#post56166729
    Haven't done the FP3 ones but his FP2 ones on complex numbers were pretty... complex.
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    (Original post by rayquaza17)
    If the matrix is A and the column vector is v, then Av=(correspondingeigenvalue)*v
    Yeah i saw that in a textbook, but didnt seem convincing to me, i was thinking of just finding eigenvalues and corresponding eigenvectors but maybe thats unnecessary thanks anyway
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    (Original post by physicsmaths)
    Hope so. I'm in the high 50s/ low 60s in III, borderline in both . WBU what's your offer?
    Posted from TSR Mobile
    How did you do in STEPI? Perhaps,if you have an S this can save you.
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    Any strong FP3ers out there?

    Try this integration (without clues) if you are hard enough...
    I will write and post solutions after my dinner (about 1 hour)
    Attached Images
  1. File Type: pdf Document1.pdf (9.2 KB, 103 views)
  2. File Type: pdf Document1 (solutions).pdf (437.1 KB, 102 views)
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    (Original post by Vesniep)
    How did you do in STEPI? Perhaps,if you have an S this can save you.
    Na prob got a 1 in I and II. Maybe a 1 in III. Most likely results is 1,1,2


    Posted from TSR Mobile
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    (Original post by TeeEm)
    Any strong FP3ers out there?

    Try this integration (without clues) if you are hard enough...
    I will write and post solutions after my dinner (about 1 hour)
    Hm, got 8.29 (3sf) but have a feeling I made a mistake somewhere in the calculation :/
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    (Original post by chemlover12)
    Hm, got 8.29 (3sf) but have a feeling I made a mistake somewhere in the calculation :/
    Perhaps you are right...
    in an exam you will be given a substitution

    use 2x = -1 + 4 coshθ

    Solutions in about 20 minutes
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    (Original post by TeeEm)
    Perhaps you are right...
    in an exam you will be given a substitution

    use 2x = -1 + 4 coshθ

    Solutions in about 20 minutes
    I expanded it and then completed the square then used the sub of
    x+1= ((squrt19)/2) cosh(theta)
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    (Original post by TeeEm)
    Any strong FP3ers out there?

    Try this integration (without clues) if you are hard enough...
    I will write and post solutions after my dinner (about 1 hour)
    i got an answer but i'm far from a STRONG fp3er

    update: i think im wrong, solution not complete, gonna give up at this point taking too much time =[
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    (Original post by chemlover12)
    I expanded it and then completed the square then used the sub of
    x+1= ((squrt19)/2) cosh(theta)
    the method is correct
    not sure if your substitution is correct.

    try my substitution
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    (Original post by ninjasinpjs)
    i got an answer but i'm far from a STRONG fp3er
    either you are very modest or a very good "cheater"!
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    (Original post by chemlover12)
    Hm, got 8.29 (3sf) but have a feeling I made a mistake somewhere in the calculation :/
    got like 11.66 but not checked and owing to some of the numbers I obtained I reckon something went wrong early on; think I got the method though..

    edit: by the method I mean a method.
    (Original post by TeeEm)
    Any strong FP3ers out there?

    Try this integration (without clues) if you are hard enough...
    I will write and post solutions after my dinner (about 1 hour)
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    (Original post by TeeEm)
    Any strong FP3ers out there?

    Try this integration (without clues) if you are hard enough...
    I will write and post solutions after my dinner (about 1 hour)
    I think I did it but the result is disgusting 😷
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    (Original post by TeeEm)
    either you are very modest or a very good "cheater"!
    mhmm, thought i got it but the solution was wayyy too short, so had a feeling it wasn't right.

    #embarrassed
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    (Original post by ninjasinpjs)
    mhmm, thought i got it but the solution was wayyy too short, so had a feeling it wasn't right.

    #embarrassed
    5 minutes to both my solutions
 
 
 
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