Solving Functions: Find f+g=5 | [0,inf)

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Homework Help Overview

The problem involves finding two functions, f and g, such that their sum equals 5 over the domain [0, ∞). The original poster seeks clarification on the interpretation of the notation (f+g)(x) and explores potential function pairs.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • The original poster questions whether (f+g)(x) indicates f(x) + g(x) and proposes simple function pairs like f(x) = 4 and g(x) = 1. Other participants suggest more complex functions while maintaining the sum of 5.

Discussion Status

Participants are exploring various function pairs that satisfy the condition, with some providing examples of both simple and more intricate functions. There is no explicit consensus, but the discussion is active and includes multiple interpretations of the problem.

Contextual Notes

The discussion is framed within the constraints of the specified domain [0, ∞) and the requirement that the sum of the functions equals 5.

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Homework Statement


Find two functions f and g such that (f+g)(x) =5 and the domain of f+g is [0,inf)


Homework Equations





The Attempt at a Solution


I am wondering if (f+g)(x) means f(x)+g(x)

If so then can i just say that f(x)=4 and g(x)=1 or f(x)=3 and g(x)=2?
 
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Yes, looks right to me.
 
Thank You :!)
 
Or you could do something exciting like
[tex]f(x) = \sqrt{x}, g(x) = 5 - \sqrt{x}[/tex]
or
[tex]f(x) = \sqrt{x} + x^2 - \frac{3 x^{12}}{1 + x}, g(x) = 5 - \sqrt{x} + x^2 - \frac{3 x^{12}}{1 + x}[/tex]
or any other function f(x) with domain [itex][0, \infty[[/itex] and define [itex]g(x) = 5 - f(x)[/itex].
 

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