The two sets are .
The set of ordered pairs is .
The set of ordered pairs is not a function from to .
Since the element "c" in A is corresponds two elements 2 and 3 in B.
No, the set of ordered pairs is not a function from A to B.
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. is not a function from ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e97559c5eceade6b530438ba2dc0c040.png\")
to ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a703e43668ee94f789ca9f9df538f77b.png\")
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is not a function from A to B.