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  1. tickboom

    Alternative way to prove nCr + 2nCr-1 + nCr-2 = n+2Cr

    Hi all, I'm a bit stuck on part ii) of this question. Part i) was easy enough, and I also know how to prove part ii) using Pascal's identity. But I can't see the link between part i) and part ii), which seems to be implied by the word "hence" in the question. Any ideas?
  2. tickboom

    Need help on a mechanics question

    Does anybody have any ideas for part ii)? I can show it for n=3, but can't work out how to show it in general. I tried induction but it didn't seem to work for me.
  3. tickboom

    My top 3 tips for tackling exams

    Good luck to everyone sitting their math exams next week! I thought I'd share my top 3 tips for heading into math exams (and probably any other exam too) ...
  4. tickboom

    Hard Proofs Question

    Does anybody have any ideas on how to approach part v) of this question? I've managed to do parts i), ii), iii) and iv), but v) is eluding me!
  5. tickboom

    Free math coaching -- Tick, Boom!

    If you are struggling with a math question and need some help, try heading to my website: tickboom.study You simply share a photo of the question you a struggling with, I record a video of me working out the solution, and then send you a link to the video. It is 100% free and easy to use, so...