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Thread: 2017 HSC Mathematics Extension 2 paper thoughts?

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    2017 HSC Mathematics Extension 2 paper thoughts?

    How did you find it?

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Does anyone have the paper, if so, could they scan it through please?

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Quote Originally Posted by frog0101 View Post
    Does anyone have the paper, if so, could they scan it through please?
    The paper goes till 5 pm.

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Haha. I got absolutely shat on.
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Quote Originally Posted by labrador1 View Post
    Much easier than I thought. Did anyone get 480 for the last question?
    i got 486 but i didn't consider that each colour has to be used at least once :/// does that affect the number of ways??


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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    These are my mc answers ;_;
    I guess you can check and compare if you rmbr yours,
    1C 2B 3D 4C 5B 6A 7A 8D 9A 10B

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Harder than past years
    Hopefully 90+ raw
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    You have to consider when there are 2 colours

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    when are solutions being released?


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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Yeah I got 480 as well, 486 - 3C2 * 2
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    I found it much harder than previous years, both my teachers agreed too and said that band 6 cutoff would be much lower this year so if anyone feels bad about how they went, dont be!
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    I do not intend to create any deliberate offence, but could those who say that this paper was harder than previous years please elaborate specifically which part of the paper they found hard?
    My students and their teachers seem to agree that the paper still followed the trend of getting easier each year - although they are mostly very high achieving students so perhaps this is a biased perspective.

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Good bye e4.
    uwannagom8 and giabaoftdt like this.
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    And I can't really pinpoint which part of the paper would've caused trouble for a typical band 6 student

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    All these ppl saying what they got for the last Q and hoping for 90+ raw mark...im sitting here knowing i got 2/15 for last question and hoping for a 70+ raw mark hahaha
    Hoping the e4 cutoff is in the high 60s (I highly doubt it tho). Lost a few marks in the earlier Qs like 13 and 14. Oh well, i reckon il get a high e3 :P
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Do internal marks matter in calculating your final hsc mark? I hope so because I don’t think I did as well as I could’ve in this exam.

    If so, how?

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    can someone explain the last question plz
    i got 486

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    That was a really bad exam for me. Probably gonna get like 55-57 raw if I didn't make really bad silly mistakes. Will this get me 80 hsc?
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Quote Originally Posted by janzrn View Post
    These are my mc answers ;_;
    I guess you can check and compare if you rmbr yours,
    1C 2B 3D 4C 5B 6A 7A 8D 9A 10B
    I think 8) should be B

    F(x) = f(f(x))
    F(-x)=f(f(-x))
    =f(-f(x))
    =-f(f(x))
    =-F(x) therefore odd
    janzrn and mkwon99 like this.

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    anyone have the paper?
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Paper looked alright to me. Pretty uninspiring Q16 as per usual from the past few years
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    It was pretty good, only skipped one q(no time for the volumes by cross section)

    Q16 was alright compared to previous years, hoping for 85 raw

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Quote Originally Posted by Commando007 View Post
    can someone explain the last question plz
    i got 486
    You probably got 486 by plugging values into the expression in the 2nd last part. However this gives the total number of ways under the assumption that not all colours have to be used.
    To remove these cases, firstly note that it is impossible to use one colour to colour the grid, so we consider the cases with 2 colours. From 3 coliurs, we can choose 2 colours in 3c2 ways, and for each combination of 2 colours, there are two ways they can be used to colour the grid. So our final answer is 486-3c2*2 =480 as stated above
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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    So let the three 3 colours be R, B and G,
    R B R B
    B R B R
    and so on, while the R and B can switch spots => 2 ways
    Since 3 colours must be painted at least once, we must find more cases like above
    since this applies to any 2 colours, there are 3C2 ways to choose the colours
    hence: total ways = 486 - 3C2 * 2

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    Re: 2017 HSC Mathematics Extension 2 paper thoughts?

    Rip arg(z/w) I did pi - tan^-1 (z/w) for some reason I turned retarded. Would I get 1/2
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