Search results

  1. tickboom

    Maths help, URGENT!!!!

    A bit late to the game but I recently gave a variant of this question to my top year 9 class. Understandably they struggled and requested an explanation, so posting here in case it helps any future students:
  2. tickboom

    Prove that the angle inscribed in a semi-circle is a right angle using Vector Methods.

    Is this essentially Thale's theorem? ... here's how I proved it without vectors ...
  3. tickboom

    Vector help - with the below questions

    This should have you sorted for Q11:
  4. tickboom

    Maths Help Roots of Complex Numbers

    This might help you for 10 d):
  5. tickboom

    *PLS HELP!* Roots & Coefficients in Quadratic Equations

    I think this is what you need?
  6. tickboom

    sryy another binomial q help plss

    ohhhh … that step is to show why you can start the summation from r=1 instead of r=0 (notice the subtle difference in where the sigma starts).
  7. tickboom

    sryy another binomial q help plss

    The second line differentiates both sides wrt x. The purpose of doing that is to get the exponents to match what we are being asked to prove.
  8. tickboom

    sryy another binomial q help plss

    Oh wait, I think my first idea does work ... Just needed a few little extra steps ...
  9. tickboom

    sryy another binomial q help plss

    Unfortunately nothing jumps out ... I did a quick crack at induction but no luck ...
  10. tickboom

    sryy another binomial q help plss

    yeah sorry I think differentiation isn’t the way to go … 🧐
  11. tickboom

    sryy another binomial q help plss

    Oh actually I think there’s still an issue with the x^r instead of x^(r-1) on the RHS … hmmmm
  12. tickboom

    sryy another binomial q help plss

    Could you differentiate both sides? And then note that for the RHS, when r=0 that term drops off? I think that gets you there …
  13. tickboom

    Maths Ext 1 - Got Some Questions

    Does this help? It's a similar question and I reckon if you use the same approach, you should be able to work it out ...
  14. tickboom

    Math Ext 2 - Got Some Questions

    These rectangles and curves questions pop up quite a bit in relation to inequality proofs, so it's good to get comfortable with the technique. Here's a few similar questions I've seen on this front:
  15. tickboom

    Maths Help

    P(B | A) = P(B and A) / P(A) ... in this case, let A be winning the first season, and B be winning the second season
  16. tickboom

    Doing Extension 2 Math Year 12

    Funnily enough I got exactly 94 for my extension 2 HSC mark. From memory I had a crack at everything, but there was one question where I was just stabbing in the dark. This was back when Extension 2 HSC exams only had 8 questions, so I’d say I felt good about 7/8 of the questions to end up with 94 …
  17. tickboom

    A general question for limits

    Yes good point well presented!
  18. tickboom

    A general question for limits

    Oooooh yes very good point! ... What about this approach? (I squared top and bottom to simplify instead) ... Or does this approach also have an issue?
  19. tickboom

    A general question for limits

    Is it 1? ... My instinct was to try and get that x out of the denominator ...
Top