anonymous
  • anonymous
Let A = {a, b, c, d} and B = {1, 2, 3, 4}. a) How many functions f: A -> B are there? b) How many functions f: A -> B satisfy f(a) = 2?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
Does that mean A onto B?
anonymous
  • anonymous
Is is a bold arrow in the problem\[A rightarrowB \]
anonymous
  • anonymous
\(A \rightarrow B\) you mean?

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More answers

anonymous
  • anonymous
Yes that is it
anonymous
  • anonymous
Hmm.. I'm not quite sure about this particular problem.
anonymous
  • anonymous
know anyone who might.
anonymous
  • anonymous
@ParthKohli can you help, please? c:
ParthKohli
  • ParthKohli
Hint: if \(A\) has \(a\) elements and \(B\) has \(b\) elements then there are \(b^a\) functions from \(A \to B\).
anonymous
  • anonymous
Okay
anonymous
  • anonymous
still a little lost
ParthKohli
  • ParthKohli
How many elements does \(A\) have in this question?
ParthKohli
  • ParthKohli
Hey, do you want the number of onto functions?
anonymous
  • anonymous
4
zzr0ck3r
  • zzr0ck3r
how about onto and 1-1 then its n!

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