Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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**Problem 3.** Consider functions \( f : \{1, 2, 3, 4\} \rightarrow \{a, b, c\} \). a. How many functions are there? b. How many functions are injective? c. How many functions are surjective?
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Transcribed Image Text:**Problem 3.** Consider functions \( f : \{1, 2, 3, 4\} \rightarrow \{a, b, c\} \). a. How many functions are there? b. How many functions are injective? c. How many functions are surjective?
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