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Can someone explain why in the permutation formula we have choices of picking the element? I don't see the logic.
This proof will help me get the binomial coefficient. יהודה שמחה ולדמן ( talk) 08:02, 23 December 2015 (UTC)
Can anyone find an expression for ? (Definite integral, infinite series or product, continued fraction, etc). If not in the general case, then at least for one or more special cases, such as etc. Thank you. — 79.118.191.221 ( talk) 22:45, 23 December 2015 (UTC)
Mathematics desk | ||
---|---|---|
< December 22 | << Nov | December | Jan >> | Current desk > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
Can someone explain why in the permutation formula we have choices of picking the element? I don't see the logic.
This proof will help me get the binomial coefficient. יהודה שמחה ולדמן ( talk) 08:02, 23 December 2015 (UTC)
Can anyone find an expression for ? (Definite integral, infinite series or product, continued fraction, etc). If not in the general case, then at least for one or more special cases, such as etc. Thank you. — 79.118.191.221 ( talk) 22:45, 23 December 2015 (UTC)