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mathematics extension 2

  1. A

    Selling Notes

    Hi, My name is Abhi, I attended a top 20 school in NSW for my HSC. As of now I have been collating all my notes together so I should be gathering more resources for each of my subjects in the following days. Here are the prices for the notes I have collated: For Mathematics Extension 2...
  2. SB257426

    Im scared lol

    Got ext 2 tmrw... i have done papers but i still feel so underprepared and i feel like i wont be able to answer a single question at all..... how about u people?
  3. SB257426

    Does anyone know what the minimum raw mark was for e4 in MX2 2022?

    I got 64 (skull face) im aiming for e4 in all the hsc past papers i did... i just wanna know
  4. SB257426

    Challenge integral

    does anyone know how to do this ? I tried doing it and i got it wrong
  5. SB257426

    How do I do this?

    I got part a ) For b) I managed to prove k^k < 1/4(k+1)^k+1 but i am struggling to prove the middle bit for some reason which shouldnt be that hard but idk why im struggling lol
  6. SB257426

    Does anyone have a derivation of the formula for the shortest distance to a line?

    Im talking about this formula: I was doing a hunters hill high extension 2 trial and they asked to find the min value of |z|. Would I need to derive this formula or can i just use it in an exam?
  7. SB257426

    Maths Extension 2 2023 Predictions?

    What do we think guys, easier or more difficult than last years?
  8. SB257426

    How to find the shortest distance between two lines ?

    The question basically is: Find the shortest distance between lines r = i+2j+3k + lambda (2i+j+4k) and r = 2i+4j+5k + mu (3i+4j+5k). I don't get these sort of questions and I really need help. Can someone give me a solution that doesn't involve the use of matrices please.
  9. A

    How would you do this ?

    I got the RHS of the inequality just dont understand why 1 is less than nth root of n. Should it not be less than or equal to?
  10. SB257426

    Prove that there is no greatest even integer

    Is this how I should complete my proof: By way of contradiction assume that 2k is the largest even integer. Now consider (2k)! (2k)! = (2k)(2k-1)(2k-2).......(k)(k-1)(k-2)......(2)(1) = 2[k(2k-1)(2k-2).......(k)(k-1)(k-2)......(2)(1)] = 2p, which is also an even integer. This contradicts...
  11. SB257426

    Can anyone please provide some feedback on my proof

    The question was asking: Prove the following statement using either direct or contrapositive proof: If n is an integer then 4 does not divide n^2-3 Here is my working out: let n^2 - 3 = 4m By way of contradiction assume n^2 - 3 is rational, ie; n^2 - 3 = a/b (BTW in the funky looking...
  12. SB257426

    Mathematical Induction Question

    For the following question when I am trying to prove the n = k+1 case am I allowed to substitute it in the first line of the question and also in the second line of the question? What I am trying to say is am i allowed to assume: