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11. If [tex][tex]$p(x) = x + 3$[/tex][/tex], then find the value of [tex][tex]$p(x) + p(-x)$[/tex][/tex].

Sagot :

To find the value of [tex]\( p(x) + p(-x) \)[/tex] given that [tex]\( p(x) = x + 3 \)[/tex], we will follow these steps:

1. Determine [tex]\( p(x) \)[/tex]:
The function [tex]\( p(x) \)[/tex] is defined as:
[tex]\[ p(x) = x + 3 \][/tex]

2. Determine [tex]\( p(-x) \)[/tex]:
Now, we need to find the value of the function when the input is [tex]\(-x\)[/tex]:
[tex]\[ p(-x) = -x + 3 \][/tex]

3. Calculate [tex]\( p(x) + p(-x) \)[/tex]:
We add [tex]\( p(x) \)[/tex] and [tex]\( p(-x) \)[/tex]:
[tex]\[ p(x) + p(-x) = (x + 3) + (-x + 3) \][/tex]
Simplifying this expression:
[tex]\[ p(x) + p(-x) = x + 3 - x + 3 = 6 \][/tex]

Therefore, the value of [tex]\( p(x) + p(-x) \)[/tex] is [tex]\(\boxed{6}\)[/tex].