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Well that sucks

Re: Westpac Maths Comp marathon Refer to the previous posts

i guessed like 100% of it lol

http://imgur.com/a/uDxq1 you found the diameter of a circle with area 16pi, not the diameter of the tube

wut

circle geo cause its fun

:'(

well you gotta look for someone who can actually teach m8, not someone who just gets 100s ;)

relax we get it mate

:'(

Hey! Thanks for pointing that out :) I did keep it as exact as possible till the very end indeed (as seen by the ellipses if you are talking about the line with the fractions) :)

$\noindent$ \mathbf{(a)}$ When $x=1.01, y=(1.01)^4+1 = 2.040604... \\ $ Gradient $=\frac{y_2-y_1}{x_2-x1} = \frac{2.0406.. - 2}{1.01-1} = 4.0604 \\ \\\mathbf{(b)}$ Repeating the process again, we get 3.994

LOL THIS QUESTION! hahah

thats golden bruh

The acceleration is always 0 when x=centre of motion (cause a=-n^2(x-b)) . If x was the least at x=0, then the centre of motion would be somewhere above 0 (and acceleration would be 0 at that point)

Re: HSC 2017 MX2 Marathon ADVANCED $ \noindent $ \cos \frac{\pi}{4}=\frac{\sqrt{2}}{2} \\ \\ 2 \cos^2 \frac{\pi}{8}-1=\frac{\sqrt{2}}{2} \\ \\ \Rightarrow \cos \frac{\pi}{8}=\frac{1}{2}\sqrt{2+\sqrt{2}} \\ \\$ Similarly, $ \sin \frac{\pi}{8}=\frac{1}{2}\sqrt{2-\sqrt{2}} \\ \\ \therefore 3...

Re: HSC 2017 MX2 Marathon $ \noindent Given $ S_n =\sum_{k=1}^{n}k^2. $ Prove by mathematical induction that: $\\ \\ \qquad nS_{n}-\sum_{r=1}^{n-1}S_r= \sum_{r=1}^{n}r^3 \quad \forall n\in \mathbb{Z}: n>1

lol here's an (another!) alternate way Case 1: Each team has 1 person it in. So the first team has person A and the other team has person B. We need to choose 3 people in the first from 7. So 7C3. For the other team, we need to choose 3 people from 4. So 4C3. So total = 4C3*7C3*1C1 = 140. We...

The school chooses the option for you. You can, however, learn an option topic by yourself but I do not think that is a good idea

ohh congrats on getting in!