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For questions that ask "how long will it take..." is it valid to simply test some numbers? For example in 2013 Mathematics 2U paper Q13)d)iii) it asks how long it takes to repay $370k If I test n = 192, A = $1387.14 and n = 193, A = -$1603.91 Therefore it will take 193 months to...

Hi, can someone explain why this graph shows that it could be both AC and DC? Maybe a trick in the wording of the question (as I thought DC only produces positive emf?) This is from the Independent 2013 btw. Thanks :)

Re: HSC 2016 2U Marathon Ok. But whats the difference between part a and part b that makes it indepdent and depedent, respectively? Thanks:)

Re: HSC 2016 2U Marathon This should be an easy one but for some reason it's messing my head really badly lol. A coin is tossed three times. A is the event "at least two tails"; B is the event "three heads or three tails"; C is the event "at least one tail". Which of the following are...

Yeah I see, but my school usually tends to be particular with "show that" (must start from scratch) where as prove that (start from LHS or RHS). I guess however because of the way they worded the question in that order (giving the answer first), it is probably good enough to just sub in the...

Quick question on the "show that" question. The question is "Show that x = pi/6 is a solution of cot(x) = tan(2x). The worked out solution from school basically they subbed x = pi/6 into cot(x) and then in tan(2x). Then they would equal, so it's a solution. BUT I thought we are supposed...

Thank you haha :)

Why? Too easy? Its actually from a school past paper and the answer might be wrong...

Quick question: A cannon shot was fired at an elevation angle of 40. A second shot was fired at the same speed, but at an elevation angle of 60. Compared with the first shot, what would the second shot expected to have: A. shorter range B. longer range C. shorter time of flight D. longer time...

Anyone know if RTA has driving tests (P1) on saturdays/school holidays esp. for the Chatswood one? Just looking at it now, either saturdays are fully booked as soon as they are available or they dont do weekend at all. As for school holidays, if they do open are they really hard to book? ie...

Bump, still looking for someone with an account of a video resource website (eg Hschub). In exchange I can supply you some top tutoring centre comprehensive notes (each week of notes has about 20-30 pages). If interested just send me a PM or email at loje1357 @ gmail.com (no spaces)

If anyone wants to share some online video resources (eg. HscHub, myhsconline, edflix) or tutoring centre notes, send me a PM, I've got some good notes on some science from a good tutoring centre. If there's a group of people who want to share around resources then maybe we shall create a...

Thanks. In an exam, would we have to put an open circle on the graph at x = -3?

Just a quick question = the denominator shows that x is NOT equal to 3 and -3. But on the graph, there isn't a vertical asymptote at x = -3 and this is also shown in the limit calculation I wrote below. Is this because, even though x is NOT equal to x = -3, there is a continuity there and the...

So Year 11 this year were the last ones to receive the crappy laptops in Year 9 but noone in our school uses them. With the new BYOD (Bring your own device), there are only a handful (2-3 per class) who brings a tablet/2-in-1 laptop to school. With Year 12 coming soon, I'm wondering if it...