How many functions from set {1,2} to set {a,b}
i calculated it 2^(2) since is a permutation with repetition. Is this right?
i calculated it 2^(2) since is a permutation with repetition. Is this right?
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Let's enumerate them
{(1,a)(2,b)}
{(1,b)(2,a)}
{(1,a),(2,a)}
{(1,b) (2,b)}
Yep, it's 4.
{(1,a)(2,b)}
{(1,b)(2,a)}
{(1,a),(2,a)}
{(1,b) (2,b)}
Yep, it's 4.
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2² is right. Not sure about the whole "permutation with repetition" thing since we didn't use that terminology in my Combinatorics class.