Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the procedure of finding the last non-zero element in ${^n\!P_k}$?

share|cite|improve this question
Related. – Gigili May 27 '12 at 14:16
Is nPk a short hand for $n! / k!$? or perhaps $n! / (n-k)!$? I am guessing based on your tag that this is about permutations. – Willie Wong Jun 12 '12 at 7:51

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.