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    UNSW Maths 1B Tutoring

    Haha what brings you to that?
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    Allowed notes for maths exam

    That's just stupid...
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    Integration

    Let u=x-2, du/dx=1 When x=4 u=2 When x=0 u=-2 So I=\int^2_{-2} u^3 \ du = 0 (f(u)=u^3, f(-u) = (-u)^3 = -u^3 = -f(u), so f(u) represents an odd function ; The integration of an odd function about symmetrical limits is zero.)
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    COMP1911 or 1917?

    LOL what are you doing on BOS?
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    Statistics question wtf

    Yeah if CI = [x bar +/- z_{1-alpha/2} rho/sqrt(n)] then the margin of error m = z_{1-alpha/2} rho\sqrt{n} ie. CI = [x bar +/- m] (or whatever respective estimator you want)
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    need help with interval question fitzpatrick

    Post the question here.
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    discriminant

    Well, if one has done a bit of linear algebra, then one would conclude that it is a polynomial in P^2 (R)... ie a vector (s,t,0)^T with respect to the standard basis {1,x,x^2} for s,t real... So it still could be a quadratic. It just depends how you define one...
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    Statistics question wtf

    Use the Taylor series expansion.... (joke -- You'd require like 30 terms for 4dp accuracy)
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    Econ2206

    I'd assume that you'd need to know regression well...
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    HSC markers kept like pigs in a pen

    In maths they did (obviously before online marking).
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    Parametric Q

    Also, it isn't all of the parabola. It's the part of parabola for which x <= -2 or x>=2, and y >= 2...
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    UNSW Bcomm or BComm/ECO??????

    From what I've heard, although accounting is very practical and useful in life, it is very boring.
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    Study tips for uni?

    There was no other lecture stream, or lecture recordings.
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    Parametric Q

    Isn't that a parabola? ...
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    Study tips for uni?

    He stopped coming to lectures after Week 3...
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    Graphs: help!

    If deg of numerator = deg of denominator then a horizontal asymptote exists. It is then given by y=(coeff of highest term in numerator)/(coeff of highest term in the denominator). So in your example it would be y=(-1)/1 ie. y=-1. And you don't do division of graphs usually. In Graphs you mainly...
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    Study tips for uni?

    Not true. One of my friends does nothing all semester. Then gets 85+ as his final mark (usually around 87-90).
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    differentiability

    If I remember my first/second year university maths correctly, differentiability is very hard to prove (continuity, however is not). But, it should be any "smooth" curve with the endpoints defined...
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    HSC markers kept like pigs in a pen

    I believe maths teachers can take the papers home to mark, as long as they don't mark it at school during teaching... Also, portable airconditioners come to mind...
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    [REQUEST] 1998 2U James Ruse Trial Worked Solutions OR Help me with my question

    Lol conditional probability... and yes I think the given answer is wrong too... I get 1/3 using 2 different ways Method 1 (conditional probability method): P(at least one red) = 1- (3/7)*(1/3) = 6/7 P(both red) = 4/7 * 1/3 = 4/21 So P(both red | at least one red) = (4/21)/(6/7) = 1/3...
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