Podcast
Questions and Answers
What is the function f(x)
equal to?
What is the function f(x)
equal to?
x - 3 / x^2 - 1
What is the result of the composition of functions f(g(x))
equal to?
What is the result of the composition of functions f(g(x))
equal to?
1/∛x - 3 / (1 / ∛x)^2 - 1
Flashcards
Function f(x)
Function f(x)
A mathematical expression that represents a relationship between input values (x) and output values (y). It can be visualized as a graph.
Square Root Function
Square Root Function
A function consisting of an expression under a square root sign. It is used to represent the relationship between the input and output of a function.
Cube Root Function
Cube Root Function
A function consisting of an expression under a cube root sign. It is used to represent the relationship between the input and output of a function.
Domain of a Function
Domain of a Function
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Composition of Functions
Composition of Functions
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Order of Operations in (g∘f)(x)
Order of Operations in (g∘f)(x)
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Simplification of Expressions
Simplification of Expressions
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Expression for f(x)
Expression for f(x)
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Expression for g(x)
Expression for g(x)
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Substitution in (g∘f)(x)
Substitution in (g∘f)(x)
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Expression for f(x)
Expression for f(x)
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Expression for g(x)
Expression for g(x)
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Simplifying (g∘f)(x)
Simplifying (g∘f)(x)
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Algebraic Manipulations
Algebraic Manipulations
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Function Composition
Function Composition
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Determining (g∘f)(x)
Determining (g∘f)(x)
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Domain of (g∘f)(x)
Domain of (g∘f)(x)
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Output of f(x)
Output of f(x)
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Study Notes
Function Composition
- Function f(x) is defined as f(x) = (x-3)/(√(x²-1)), where x² ≠1
- Function g(x) is defined as g(x) = 1/(∛x) , where x ≠0
- The domain of f(x) is all real numbers except x = ±1
- The domain of g(x) is all real numbers except x = 0
- The composite function fog(x) is calculated as f(g(x))
- fog(x) = (g(x) - 3) / √(g(x)² - 1)
- Substituting g(x) into the expression for fog(x) gives (1/∛x - 3)/√((1/∛x)² - 1)
- This simplifies to (1 - 3∛x)/√(1/∛x² - 1)
- The composition gof(x) is calculated as g(f(x))
- gof(x) = 1/∛f(x)
- Substituting f(x) into the expression for gof(x) gives 1/∛((x-3)/(√(x²-1)))
- Simplifying gives ∛(√(x²-1))/(x-3)
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Description
Test your understanding of function composition with this quiz on f(x) and g(x). You'll explore the calculation of fog(x) and gof(x), and see how to simplify these composite functions. Perfect for those studying advanced algebra concepts.