Math Problem Statement
Find (g ∘ f)(x) and (f ∘ g)(x) for the given functions f and g. f(x) =
x + 5 , g(x) = 1 x (g ∘ f)(x) =
(f ∘ g)(x) =
Solution
To find and , we need to compute the compositions of the functions and .
1. Finding :
This means we substitute into .
- Start with .
- Substitute into :
Therefore,
2. Finding :
This means we substitute into .
- Start with .
- Substitute into :
Therefore,
Summary:
Would you like more details or have any questions?
Here are 5 related questions:
- What are the domains of and ?
- How do you find the inverse of a composition of two functions?
- What is the range of ?
- Can you find and ?
- How do you verify if two functions are inverses of each other?
Tip: When working with function compositions, always check the domains of the individual functions and the composed function to ensure that all values are valid.
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Math Problem Analysis
Mathematical Concepts
Function Composition
Algebra
Inverse Functions
Formulas
(g ∘ f)(x) = g(f(x)) = 1/(x + 5)
(f ∘ g)(x) = f(g(x)) = 1/x + 5
Theorems
Function Composition Theorem
Domain and Range Restrictions
Suitable Grade Level
Grades 9-12
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