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Lol yep. That's what I feel about actuarial and maths. I still do it anyway. Hey, there's people out there who do law/music and other distinct combinations Business is fun! Yeah. I'm keeping it for a bit longer since I survived last semester.

Woahh. Computer science is good but don't ditch the commerce! Yeah, I'm dead.

What degree do you study now? :P

Re: Several Variable Calculus There was a question in my test that I could not do and I'm seeking a solution please \text{Determine with explanations whether or not the point }\textbf{a}=(0,1)\\ \text{is a boundary point for the set}\\ S=\{(x,y)\in \mathbb{R}^2 : x\neq 0, y=\sin \frac1x \}

Re: MATH2601 Linear Algebra/Group Theory Questions \text{Let }V\text{ be a finite-dimensional vector space and }T:V\to V\text{ be a linear transformation}\\ \text{Are the following true or false} The questions were \\\text{a) If }<\textbf{u}\mid T(\textbf{v})>\, =0\text{ for all...

Re: Statistics Course pack is just what I use to call the online 'textbook' thing. It's like what we had in first year except it's just not printed.

Re: Several Variable Calculus So for a continuous mapping f: are the following always true (I didn't really define the domain and codomain of f so just assume whatever's convenient please) 1) U is closed => f^-1(U) is closed 2) U is open => f^-1(U) is open 3) U is closed => f(U) is closed 4)...

Re: Statistics Can't deny it. I'm also a fair bit behind. Been cramming a lot of the course pack tbh.

Re: HSC 2017 MX2 Integration Marathon The reverse quotient rule isn't obvious. The denominator involves an odd power. Try making it an even power somehow.

Re: HSC 2017 MX2 Integration Marathon Hmm... I wonder where this question came from...

Re: Several Variable Calculus Seriously? If I am stuck on a question why can I not ask for help? Accusing me of cheating on an assignment if I genuinely can't do my homework is just low.

Re: Several Variable Calculus Oh damn, looks like the brute way is the only way out of that one. Was hoping for a shortcut _________________________ I got asked a question but I haven't seen the notation before \text{Let }\phi =-4xy^3+z^2x \text{Compute }\nabla \phi\text{ and verify...

Re: International Baccalaureate Maths Marathon Keep in mind that infinity is not a number.

Re: Statistics I think the expressions are right. But I'm not sure what the parameters mean either. This question is pretty much an example but for an arbitrary scenario how would I be able to tell what the parameters (N, K, n) actually meant?

Re: Statistics I wasn't taught the hypergeometric distribution properly so can someone walk me through how to use it? Here's my question if it helps to refer to it. A factory produces 80 items in a batch. To test if the batch is defective, an acceptance sampling scheme is adopted: a random...

Re: MATH2601 Linear Algebra/Group Theory Questions So that part makes sense now. How do we complete the proof if |H| = 1?

Re: Several Variable Calculus Just a brief sketch-out please f(x)=\begin{cases}0 & (x,y)=(0,0)\\ \frac{2xy}{x^2+y^2} & \text{otherwise}\end{cases} \text{Why is it that }\frac{\partial^2 f}{\partial x \partial y}(0,0)\text{ DNE?} I know that f is not continuous at 0 but I'm not sure if...

Re: MATH2601 Linear Algebra/Group Theory Questions G\text{ is a group and }a\in G.\text{ Proven in a) }\{a^k \mid k \in \mathbb{Z}\}\text{ is a subgroup of }G \text{Proven in b) if }H\text{ is finite, then }\exists m \in \mathbb{Z}^+:\\ a^m=e\text{ and }H=\{e,a,a^2,\dots,a^{m-1}\}...

Re: UNSW chit chat thread 2017 What do you reckon would be the candidature for such a course? Given it's a level 1 course it should have a solidly sufficient amount of students to be run.

Re: MATH2601 Linear Algebra/Group Theory Questions \text{Prove that if }\alpha\textbf{v}=\textbf{0}\text{ then either }\alpha=0\text{ or }\textbf{v}=\textbf{0} I have most of the proof covered up but I'm getting confused at the last bit. \text{It is trivially true when }\alpha=0\text{...