Math Problem Statement

Evaluate each composition of functions using the given values in the table. The table contains x values and corresponding outputs for f(x) and g(x). Evaluate expressions like (f ∘ g)(1), (f ∘ g)(2), etc.

Solution

Let's go through each part of the problem by interpreting the composition of functions from the table.

Given table values:

  • xx values: 3,2,1,0,1,2,3-3, -2, -1, 0, 1, 2, 3
  • f(x)f(x): 10,8,6,4,2,0,210, 8, 6, 4, 2, 0, -2
  • g(x)g(x): 9,3,0,3,0,3,9-9, -3, 0, 3, 0, -3, -9

Solutions:

a. (fg)(1)(f \circ g)(1)

  1. Find g(1)g(1): From the table, g(1)=0g(1) = 0.
  2. Then, find f(g(1))=f(0)f(g(1)) = f(0): From the table, f(0)=4f(0) = 4.
  3. So, (fg)(1)=4(f \circ g)(1) = 4.

b. (fg)(2)(f \circ g)(2)

  1. Find g(2)g(2): From the table, g(2)=3g(2) = -3.
  2. Then, find f(g(2))=f(3)f(g(2)) = f(-3): From the table, f(3)=10f(-3) = 10.
  3. So, (fg)(2)=10(f \circ g)(2) = 10.

c. (gf)(2)(g \circ f)(2)

  1. Find f(2)f(2): From the table, f(2)=0f(2) = 0.
  2. Then, find g(f(2))=g(0)g(f(2)) = g(0): From the table, g(0)=3g(0) = 3.
  3. So, (gf)(2)=3(g \circ f)(2) = 3.

d. (gf)(3)(g \circ f)(3)

  1. Find f(3)f(3): From the table, f(3)=2f(3) = -2.
  2. Then, find g(f(3))=g(2)g(f(3)) = g(-2): From the table, g(2)=3g(-2) = -3.
  3. So, (gf)(3)=3(g \circ f)(3) = -3.

e. (gg)(1)(g \circ g)(1)

  1. Find g(1)g(1): From the table, g(1)=0g(1) = 0.
  2. Then, find g(g(1))=g(0)g(g(1)) = g(0): From the table, g(0)=3g(0) = 3.
  3. So, (gg)(1)=3(g \circ g)(1) = 3.

f. (ff)(3)(f \circ f)(3)

  1. Find f(3)f(3): From the table, f(3)=2f(3) = -2.
  2. Then, find f(f(3))=f(2)f(f(3)) = f(-2): From the table, f(2)=8f(-2) = 8.
  3. So, (ff)(3)=8(f \circ f)(3) = 8.

Summary of Answers:

  • a. (fg)(1)=4(f \circ g)(1) = 4
  • b. (fg)(2)=10(f \circ g)(2) = 10
  • c. (gf)(2)=3(g \circ f)(2) = 3
  • d. (gf)(3)=3(g \circ f)(3) = -3
  • e. (gg)(1)=3(g \circ g)(1) = 3
  • f. (ff)(3)=8(f \circ f)(3) = 8

Would you like further details on any of these solutions?


Here are 5 related questions to expand your understanding:

  1. How do you interpret function composition in general terms?
  2. Can you explain the difference between (fg)(x)(f \circ g)(x) and (gf)(x)(g \circ f)(x)?
  3. What are some real-world applications of function composition?
  4. How does function composition affect the domain and range of functions?
  5. Can you find any other compositions of functions using this table?

Tip: When evaluating compositions, always start from the innermost function and work outward.

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Math Problem Analysis

Mathematical Concepts

Function Composition
Evaluating Functions

Formulas

(f ∘ g)(x) = f(g(x))
(g ∘ f)(x) = g(f(x))

Theorems

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Suitable Grade Level

Grades 10-12