First slide

Functions (XII)

Question

If A = {1,8,11,14,25} then the condition to define a surjection from A to B is

Easy

A

n(A) + n(B) = 20
B

n(A) < n(B)
C

$n (B) \leq 5$
D

n(B) = 10

Solution

$n (A) \geq n (B) \Rightarrow n (B) \leq 5$

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