Recent content by deterministic

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    MATH1131 vs MATH1141

    Do 1141, scaling is epic compared to 1131 and its not much harder.
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    Easiest finance elective

    All finance courses are WAM boosters ... just pick any
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    permutation help!

    1) Since you want the letters of KOALA in order, fix those first: __ K __ O __ A __ L __ A __ The lines indicate the spots the letters of GUMTREE can be placed 2) Choose the spot for the letter G: 6 spots means 6 ways to do so. Then our arrangement becomes something like (depending on...
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    permutation and combination

    Number of ways with both students with at least 1 book = Total number of ways - Number of ways that one student has no books Using that, we have: Total number of ways= 2x2x2x2x2x2 = 2^6 (each book can go to 2 positions) Number of ways where one student has no books =2 Hence Number of ways...
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    help, with polynomial question!!

    This is what Carrotsticks is referring to: http://en.wikipedia.org/wiki/Rational_root_theorem
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    Probability Question, need help with a logial way.

    What's the probability of rolling a 2 and a 1? Compare this with the probability of rolling two 1s. That should answer your questions.
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    Commerce queries

    For IBs its more like 80 WAM
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    Finance Electives

    I did SAV and IRRM, both of which are pretty easy. None of them really that interesting to be honest. It doesn't really matter which finance course you choose as they are generally good WAM boosters. Henry Yip's tests aren't hard and he scales pretty generously too.
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    Higher vs Normal (Maths)

    normal generally have slightly less content (around 1 topic less than higher). For higher, the topics they share with the normal level would include an extension. This is compensated by the fact is much easier to get a higher mark (HD+) in higher than normal if you are decent at maths.
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    MATH1081 and MATH1231

    If you like maths, do 1081 cos its a lot more interesting than 1231 (which will be mandatory anyway). Otherwise its not necessary.
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    Fun little problem

    just work backwards, screw using equations and algebra
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    another complex question

    Although to do it properly is difficult, using some tricks make it easy. These tricks shouldn't really be used for normal questions. This is really a more educated trial and error keeping in mind the design of the question. The idea is to note that since we are adding 2 real numbers on left...
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    worth buying Matlab?

    No you don't use matlab a lot in any commerce degree. Seriously though, why would you buy it anyway. There are plenty of ways around it.
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    Complex number

    See that \frac{z_1}{z_2}=r(\cos\theta+i\sin\theta) where r is the modulus and \theta is the argument. Your aim is then to find the theta and r. r is obvious to find. Consider \theta. We know that the sides z1, z2, z1-z2 forms a triangle with side lengths 3,4 and \sqrt{37} respectively (draw a...
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    HSC 2012 MX2 Marathon (archive)

    Re: 2012 HSC MX2 Marathon question kinda hints to use GP Noting that |\sin x|< 1 for 0 < x < \frac{\pi}{2}, see that: \int \frac{\sin x+1}{\cos x} dx &= \int \frac{1-\sin^2 x}{\cos x (1-\sin x)} dx = \int \frac{\cos x}{1-\sin x} dx=\int \cos x \sum_{n=0}^\infty \sin^n x dx Assuming...
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