Composition of Functions

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•
Mathematics
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the composition of functions?
Back
The composition of functions is a process where one function is applied to the result of another function, denoted as (f ° g)(x) = f(g(x)).
2.
FLASHCARD QUESTION
Front
If f(x) = 2x + 3 and g(x) = x - 1, what is (f ° g)(2)?
Back
(f ° g)(2) = f(g(2)) = f(1) = 2(1) + 3 = 5.
3.
FLASHCARD QUESTION
Front
Define the term 'domain' in the context of functions.
Back
The domain of a function is the set of all possible input values (x-values) for which the function is defined.
4.
FLASHCARD QUESTION
Front
What is the range of a function?
Back
The range of a function is the set of all possible output values (y-values) that the function can produce.
5.
FLASHCARD QUESTION
Front
If p(x) = x^2 and q(x) = 3x, find p(q(1)).
Back
p(q(1)) = p(3) = 3^2 = 9.
6.
FLASHCARD QUESTION
Front
What does it mean for two functions to be 'inverse functions'?
Back
Two functions f and g are inverse functions if (f ° g)(x) = x and (g ° f)(x) = x for all x in the domain.
7.
FLASHCARD QUESTION
Front
If f(x) = x + 2 and g(x) = x^2, what is (g ° f)(3)?
Back
(g ° f)(3) = g(f(3)) = g(5) = 5^2 = 25.
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