What is the minimum value of 
? Consider only positive x-values.
Definitions:
Serotonin
A chemical messenger in the brain crucial for maintaining stable mood, as well as promoting feelings of contentment and joy.
Peripheral Nervous System
The part of the nervous system outside the brain and spinal cord, which connects the central nervous system to limbs and organs.
Sympathetic Nervous System
Part of the autonomic nervous system that prepares the body for physical activity by increasing heart rate, constricting blood vessels, and raising blood pressure.
Parasympathetic Nervous System
The division of the autonomic nervous system that calms the body, conserving its energy.
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