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A few quick maths questions! PS. Its a bit of a competition! watch

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    I have a few maths problems for you alls. They start easy and get harder. Points to the first person with correct answer. Winner is person with most points! The first topic is Complex Numbers:

    Question 1:

    Find the real part of (3-3i)(6-i)

    Answers please...
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    Oh, and don't forget to show your working!
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    15, sorry, took no working
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    what are the prizes? :rolleyes:
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    15.

    dammit too late:mad:
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    Yeh, like i said, they start easy! Prizes are yet to be revealed.....oooh the mystery!

    Points:
    Spenceman_ = 1

    Question 2:

    Find the imaginary part of (3+i)/(i-3)
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    (3/2)i ?
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    not so sure about that one, a bit rushed.

    Would love to stay but it's bedtime for me...Have fun.
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    (Original post by Rustyk1)
    Yeh, like i said, they start easy! Prizes are yet to be revealed.....oooh the mystery!

    Points:
    Spenceman_ = 1

    Question 2:

    Find the imaginary part of (3+i)/(i-3)
    6i ???
    my workin

    3+i/i-3 x i+3/i+3
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    Don't think that's right. Yeh, bed for me too after later with Jools has finished!

    God i can't wait for live 8!
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    0.6
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    So close...
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    Find the imaginary part of (3+i)/(i-3)[/QUOTE]

    (6/10) i
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    lol, maybe i'm wrong but in my working i get -0.6i. I can accept i am wrong...?
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    (Original post by Rustyk1)
    lol, maybe i'm wrong but in my working i get -0.6i. I can accept i am wrong...?
    nah ur rite
    its -0.6 i

    nite nite
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    Yes it is -0.6

    Remember the imaginary part is the y bit in x+iy - not the iy bit - and so is always a real number
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    (Original post by Rustyk1)
    lol, maybe i'm wrong but in my working i get -0.6i. I can accept i am wrong...?
    Lol, sorry, I cant even copy the answer google gave me correctly
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    so, first correct answer, apart from me is darth_vader05!

    Points:
    Spenceman_ = 1
    darth_vader05 = 1

    Question 3:

    Find the real part of either solution of

    x² - 2x + 5 = 0

    Getting tricker now?
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    (Original post by Rustyk1)
    so, first correct answer, apart from me is darth_vader05!

    Points:
    Spenceman_ = 1
    darth_vader05 = 1

    Question 3:

    Find the real part of either solution of

    x² - 2x + 5 = 0

    Getting tricker now?
    1. using quadratic eqn.
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    Can we do these in reverse order? :rolleyes:
 
 
 
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Updated: June 21, 2005
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