Recent content by laters

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    Hi

    Hi
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    First Year Mathematics B (Integration, Series, Discrete Maths & Modelling)

    Re: MATH1231/1241/1251 SOS Thread make dy/dx the subject and you'll see. substitution y(x)=x.v(x)
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    UNSW 2016S1 Results Thread

    Nice nice! Actual goals
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    dividing into equal groups

    "How many ways can 21 people be divided into 3 equal groups?" Just wondering if the answer should be 21C7 14C7 7C7 or same but divided by 3!, seeing as I don't know if the groups are implied to be 'distinct' or not.
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    UNSW 2016S1 Results Thread

    I'm over the moon then :) :) Is there any chance that it would change?
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    UNSW 2016S1 Results Thread

    I'm doing fins1613, acct1501, math1151, econ1101. My decimal point is .5
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    UNSW 2016S1 Results Thread

    Is it possible that some student results are entered later than others for the same subject? Because mine is a lot of points (like almost 10) over what I'm expecting lol
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    UNSW chit chat thread

    Re: UNSW chit chat thread 2016 can anyone who's done actl1101 confirm lectures are definitely recorded? would I be missing much just watching them from home
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    Ma...tri...ces..

    If AB=BA (A, B square) does that necessitate that AB=BA=I? As in, if given AB=BA can I deduce that A and B are inverses?
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    UNSW chit chat thread

    Re: UNSW chit chat thread 2016 Does anyone know if the provisional timetables usually deviate much from the final exam timetable?
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    Mean Value Theorem proofs

    Thanks leehuan and Integrand!! I managed to get the arctan one out. However for the first one I asked, I just want some clarification. I know 23 < c < 27 so if c < 27 then I can obtain the lower bound. But obviously if I use c>23 then I would require a calculator to show that the 3-23^(1/3)<...
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    Mean Value Theorem proofs

    Can anyone prove \frac{4}{27}<3-23^{\frac{1}{3}}<\frac{3}{16} using the mean value theorem? I've been trying to come up with functions that I can apply the MVT to but I've gotten stuck. Also for \frac{8}{145}<\tan^{-1} \frac{9}{8}-\frac{\pi}{4}<\frac{1}{16}
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    Laters' Maths Help Thread

    Let f be continuous in \mathbb{R} with \lim_{x\rightarrow\infty}f(x)=\lim_{x\rightarrow-\infty}f(x)=0 Showthat if there is a number \xi such that f(\xi)>0 then f attains a maximum value in the reals. [Note the max min theorem applies to finite closed intervals [a,b] only]...
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    Laters' Maths Help Thread

    2) Suppose that for any K>2 the solution to f(x) > K is [tex]x\epsilon(1,\frac{K}{K-2})[\tex] What is the behaviour of f(x) as x approaches 1+? Carefully explain your answer This is mainly a problem with my working. So intuitively I know that the limit must be infinity. the reason being that...
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    Laters' Maths Help Thread

    Hey guys, I don't come on here often but I've seen similar threads so I've decided to make one too :) For your reference I am doing MATH1151 this sem. 1) Find \lim_{x\rightarrow\infty} \sin\frac{1}{x} . I already know it's 0 but they want a solution using the pinching theorem.
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