Taking the set of natural numbers as the universal set,write down the complement of the following set:
$A = \{x: 2x + 5 = 9\}$
$A = \{x: 2x + 5 = 9\}$
(N/A) Given the universal set $U = N$ (the set of natural numbers).
Let the set be $A = \{x: 2x + 5 = 9\}$.
Solving the equation: $2x + 5 = 9 \implies 2x = 4 \implies x = 2$.
So,$A = \{2\}$.
The complement of set $A$ is $A' = U - A = \{x: x \in N \text{ and } x \neq 2\}$.
Let the set be $A = \{x: 2x + 5 = 9\}$.
Solving the equation: $2x + 5 = 9 \implies 2x = 4 \implies x = 2$.
So,$A = \{2\}$.
The complement of set $A$ is $A' = U - A = \{x: x \in N \text{ and } x \neq 2\}$.
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