# mathematics extension 2

1. ### 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. ### 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. ### 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. ### Challenge integral

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

7. ### 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?
8. ### Maths Extension 2 2023 Predictions?

What do we think guys, easier or more difficult than last years?
9. ### 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.
10. ### 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?
11. ### 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...
12. ### 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...
13. ### 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: