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    Zacken


    Hi for (z+1)^3 = -1,

    the roots of z do not equal 0 can you expalin why pls, is it because there is a constant attached to z?
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    https://8fd9eafbb84fdb32c73d8e44d980...lZweHc/CH3.pdf

    Someone explain Page 61 part c, how did they come to the conclusion of working out the points and radius pls
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    (Original post by Mihael_Keehl)
    Zacken


    Hi for (z+1)^3 = -1,

    the roots of z do not equal 0 can you expalin why pls, is it because there is a constant attached to z?
    What do you mean? Are you saying that one of the roots should be z=0?

    That's obviously not possible since (0+1)^3 = 1^3 =/= -1
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    (Original post by Zacken)
    What do you mean? Are you saying that one of the roots should be z=0?

    That's obviously not possible since (0+1)^3 = 1^3 =/= -1
    no lmfao, I did not mean that, that is obvious haha.

    I mean the sum of the roots of unity do not equal zero, as what is the case for other types where z is isolated in FP2 Chapter 3 Ex3E.
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    (Original post by Mihael_Keehl)
    no lmfao, I did not mean that, that is obvious haha.

    I mean the sum of the roots of unity do not equal zero, as what is the case for other types where z is isolated in FP2 Chapter 3 Ex3E.
    Because these aren't the roots of unity - they're the roots of -1. The roots of unity are the roots of 1...
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    (Original post by Zacken)
    Because these aren't the roots of unity - they're the roots of -1. The roots of unity are the roots of 1...
    don't most of the roots in fp2 dmt types have the roots add up to zero, I have obeserved this serveral times..
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    (Original post by Mihael_Keehl)
    don't most of the roots in fp2 dmt types have the roots add up to zero, I have obeserved this serveral times..
    They probably add to -3 in this case. Because ( z_1+1) + (z_2+1)+(z_3+1)=0
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    (Original post by EricPiphany)
    They probably add to -3 in this case. Because ( z_1+1) + (z_2+1)+(z_3+1)=0
    I think it is just -2.
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    (Original post by Mihael_Keehl)
    I think it is just -2.
    That's weird. What did I do wrong?
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    (Original post by Mihael_Keehl)
    I think it is just -2.
    It's -3. I just checked it.
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    (Original post by EricPiphany)
    It's -3. I just checked it.
    (Original post by Mihael_Keehl)
    I think it is just -2.
    I agree with Eric, the solutionbank lists the wrong answer down at the end.
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    Please could someone explain for the method of differences how you know what cancels when there's 3 parts to the partial fraction, like in question 20b here https://8fd9eafbb84fdb32c73d8e44d980...ZweHc/REV1.pdf I can see it's obvious when the question has 2 terms but I can't figure it out when there's 3?
    Thanks
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    (Original post by EricPiphany)
    It's -3. I just checked it.
    the roots are -2, -1/2 + isqrt3 /2 and 1/2 - isqrt3 /2 according to the document.

    However I get a different answer, I was reading off the previous document before Lol.
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    (Original post by economicss)
    Please could someone explain for the method of differences how you know what cancels when there's 3 parts to the partial fraction, like in question 20b here https://8fd9eafbb84fdb32c73d8e44d980...ZweHc/REV1.pdf I can see it's obvious when the question has 2 terms but I can't figure it out when there's 3?
    Thanks
    when you write enough of the columns at most when you have 5 rows, you will observe a pattern and then you cancel accordingly.
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    From ex 7b 5b

    can we express 4/(1+sin2x) in terms of cosecx?

    Why can it not be written as 4 (1+ cosec2x)
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    Page 7 part c

    I put 3/sqrt2 [cosec (45 - theta)] is that acceptable?
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    (Original post by Mihael_Keehl)
    From ex 7b 5b

    can we express 4/(1+sin2x) in terms of cosecx?

    Why can it not be written as 4 (1+ cosec2x)
    \frac{1}{1+\sin 2x} \neq 1 + \frac{1}{\sin 2x} = 1 + \csc 2x
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    (Original post by Zacken)
    \frac{1}{1+\sin 2x} \neq 1 + \frac{1}{\sin 2x} = 1 + \csc 2x
    I see, thnk you
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    Hi, please could someone explain how you find the area in question 63 of rev 2 https://8fd9eafbb84fdb32c73d8e44d980...ZweHc/REV2.pdf, is there a general method to follow when finding areas of overlapping regions? Thanks
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    (Original post by economicss)
    Hi, please could someone explain how you find the area in question 63 of rev 2 https://8fd9eafbb84fdb32c73d8e44d980...ZweHc/REV2.pdf, is there a general method to follow when finding areas of overlapping regions? Thanks
    Page no.?
 
 
 
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