# Thread: mathematical induction with an inequality

1. ## mathematical induction with an inequality

Dear all,
I am having some trouble with this question. I looked at the markscheme and it doesn't really make sense to me. Please would someone be able to explain it? Thank you,

2. ## Re: mathematical induction with an inequality

Originally Posted by bbear123
Dear all,
I am having some trouble with this question. I looked at the markscheme and it doesn't really make sense to me. Please would someone be able to explain it? Thank you,
You must tell us much more. At what point in the proof do you loose understanding?

Do you understand the proof down to: $\ge 2(k+1)(2k+1)[2k]!2^k~?$

3. ## Re: mathematical induction with an inequality

Now I understand it, nevermind! At first I didn't understand the first A1 step of the proof