A community for students.
Here's the question you clicked on:
← 55 members online
 0 viewing
anonymous
 one year ago
Let A and B be nonempty ﬁnite sets with A = m and B = n
If m > n, then ﬁnd the number of onto functions from A to B
anonymous
 one year ago
Let A and B be nonempty ﬁnite sets with A = m and B = n If m > n, then ﬁnd the number of onto functions from A to B

This Question is Closed

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1you need the formula or an explanation?

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1if you just need the formula it is \[\sum_{k=0}^n(1)^k\binom{n} {k}(nk)^m\]

misty1212
 one year ago
Best ResponseYou've already chosen the best response.1if you need an explanation, here is a decent one http://math.stackexchange.com/questions/334420/numberofontofunctions
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.