# Search results

1. ### Proofs

Exactly - I'll just clarify further but I think you got it. Because (p-1)! = (p-1)(p-2)...(a+1)(a)(a-1)...(3)(2)(1), which has a factor of a
2. ### Proofs

well first off the question is wrong (p = 1 is a counterexample) but if we be generous and change ‘prime’ to ‘not composite’ then yes SadCeliac is right go by contrapositive: p is composite => p does not divide that thing so p is composite, we can write it as p=ab, where 1<a<p so (p-1)! is a...
3. ### Should I Do E2

Honestly there’s probably more content for advanced than ext 1 and 2 combined. You’ll be fine on that front. The bigger question is how good are you at tackling really hard questions (not hard content, hard questions)? If you aren’t sure, give it a go but make sure you’ve got room to drop it...
4. ### 2U Math Q

As long as you use the same star for m2 and b2, you'll get the same answer. It's a nice fact about logs that log(\frac{1}{x})=-log(x) so that means it works either way.
5. ### Data science URGENT

I guess where I'm not sure is what we're trying to do with a simulation - you may get unlucky and never earn the maximum profit. Are we just trying to see statistically what's most likely?
6. ### Data science URGENT

Look I'm not sure how you'd simulate it, but the maximum profit for one game would just be the profit that you'd earn if you got a 5 or 6 with every roll.

Thank you
8. ### Can anyone please provide some feedback on my proof

Dunno if you still need help on this … if you don’t just ignore but otherwise here’s what I have to say You said: By way of contradiction assume n^2-3 is rational. The problem here is that the question isn’t asking us to prove it’s irrational. It’s asking us to prove it’s a multiple of 4. So...
9. ### Physics Year 11 Assessment task 1

Completely agree with what everyone’s said. But also you can often improve a lot more than you think. I know people at my school who got Band 6s comfortably in math Extension 1 last year, despite starting off the year with not-so-great marks (can’t talk for physics as I don’t know many peoples...
10. ### Maths in Actuarial Studies

Thanks everyone for the helpful replies. seems like I’ll be sticking with math and maybe comp sci

Thank you!
12. ### Maths in Actuarial Studies

Sorry I know there are already so many threads on this topics but I've got a few questions I can't seem to find clear answers to and would appreciate any thoughts, especially from those taking Actuarial Studies or a similar degree For context, I'm a 2023 HSC student studying maths ext 2 (among...