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What we are given in part A) This is part B)

Whats given

What we are asked to prove What to Prove

My best idea is that if you evaluate what the proof is, it turns into what is given except A is Ai and B is Ai+1 and all the way to An. On the other side, its just |A||Ai+1|...|An|. So they are the same thing I can just expand the proof and use the given?

k9b
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1 Answers1

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You're on the right track. You'll want to use induction, and you have the base case $|A_1|=|A_1|$. Now you just need to make the inductive step using what you are given.

desi
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