Composite Functions Review

Flashcard
•
Mathematics
•
12th Grade
•
Hard
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14 questions
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1.
FLASHCARD QUESTION
Front
Define a composite function.
Back
A composite function is a function that is formed by combining two functions, where the output of one function becomes the input of the other. It is denoted as (f ∘ g)(x) = f(g(x)).
2.
FLASHCARD QUESTION
Front
What is the notation for composite functions?
Back
The notation for composite functions is (f ∘ g)(x), which means f(g(x)).
3.
FLASHCARD QUESTION
Front
If g(x) = 2x + 3 and h(x) = x^2, find (g ∘ h)(2).
Back
(g ∘ h)(2) = g(h(2)) = g(2^2) = g(4) = 2(4) + 3 = 11.
4.
FLASHCARD QUESTION
Front
What is the inverse of a function?
Back
The inverse of a function f(x) is a function that reverses the effect of f. If f(x) = y, then the inverse function f^(-1)(y) = x.
5.
FLASHCARD QUESTION
Front
How do you determine if two functions are inverses?
Back
Two functions f and g are inverses if (f ∘ g)(x) = x and (g ∘ f)(x) = x for all x in the domain.
6.
FLASHCARD QUESTION
Front
Calculate h(g(-3)) if h(x) = x^2 + 2 and g(x) = 3x - 1.
Back
h(g(-3)) = h(3(-3) - 1) = h(-10) = (-10)^2 + 2 = 102.
7.
FLASHCARD QUESTION
Front
What is the composition of functions g(t) = 4t - 2 and h(t) = t^2 + t?
Back
(g ∘ h)(t) = g(h(t)) = g(t^2 + t) = 4(t^2 + t) - 2 = 4t^2 + 4t - 2.
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