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Zorluk: KolayFunction Evaluation, Composition, and Properties

The table below gives values for the functions ff and gg at selected values of xx:

xxf(x)f(x)g(x)g(x)
135
254
321
412
543

Based on the table, what is the value of f(g(3))f(g(3))?

  1. A
    1
  2. B
    2
  3. 3Cevap
  4. D
    4
  5. E
    5

Cevap

3
To evaluate the composite function f(g(3))f(g(3)), we first evaluate the inner function, g(3)g(3). Looking at the table, when x=3x = 3, g(3)=1g(3) = 1. We then substitute this output into the outer function to evaluate f(1)f(1). According to the table, when x=1x = 1, f(1)=3f(1) = 3. Therefore, the value of the composite function is 3.

Adım Adım Çözüm

1
Locate the input value of 3 in the table to evaluate the inner function g(3)g(3).
g(3)=1g(3) = 1
We must evaluate the inner function first in the composition f(g(x))f(g(x)).
2
Substitute the result of g(3)g(3) into the outer function, giving f(1)f(1), and find its value in the table.
f(1)=3f(1) = 3
Evaluating f(x)f(x) at x=1x = 1 completes the composition f(g(3))f(g(3)).

Anahtar Kavram

Evaluating a composite function from a table of values by finding the output of the inner function and using it as the input for the outer function.
Tahmini Süre:45s
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