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Re: Proof of binomial theorem by mathematical induction in Jones and Couchman 3U Math Okay, I got it. I've been looking at it as (n-1)(n-2)...[n-(k+1)].

I'm reading through the proof of the binomial theorem by mathematical induction given in Jones and Couchman 3 Unit Mathematics Book 2. In the course of the proof they have a fraction with k[(n-1)(n-2)...(n-k+1)]+[(n-1)(n-2)...(n-k)] in the numerator. The denominator is k!. In the next line of...