Math Problem Statement

Use the graphs of f and g shown below to find the following: (a) g(f(1)) ≈ ? (b) f(g(2)) ≈ ?

Solution

From the provided image, we have two graphs representing functions f(x)f(x) and g(x)g(x). We need to compute the following:

  1. g(f(1))g(f(1))
  2. f(g(2))f(g(2))

Let's break these down step by step using the graphs:

(a) g(f(1))g(f(1)):

  1. First, find f(1)f(1) from the graph of f(x)f(x).
    • Looking at the graph, when x=1x = 1, f(1)=3f(1) = 3.
  2. Now, substitute f(1)=3f(1) = 3 into g(x)g(x), i.e., find g(3)g(3).
    • From the graph of g(x)g(x), when x=3x = 3, g(3)=2g(3) = -2.

Thus, g(f(1))=g(3)=2g(f(1)) = g(3) = -2.

(b) f(g(2))f(g(2)):

  1. First, find g(2)g(2) from the graph of g(x)g(x).
    • From the graph, when x=2x = 2, g(2)=0g(2) = 0.
  2. Now, substitute g(2)=0g(2) = 0 into f(x)f(x), i.e., find f(0)f(0).
    • From the graph of f(x)f(x), when x=0x = 0, f(0)=5f(0) = 5.

Thus, f(g(2))=f(0)=5f(g(2)) = f(0) = 5.

Final Results:

  • g(f(1))=2g(f(1)) = -2
  • f(g(2))=5f(g(2)) = 5

Would you like further details or explanations? Here are five related questions to deepen understanding:

  1. How do we interpret function composition when given two graphs?
  2. What is the domain and range of the given functions ff and gg?
  3. How would f(g(x))f(g(x)) change if we changed the graph's scale?
  4. What are some applications of function composition in real-world problems?
  5. Could you solve g(f(x))g(f(x)) for other values of xx?

Tip: Always check the axes' scales carefully when interpreting graphs to avoid mistakes in reading values.

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Math Problem Analysis

Mathematical Concepts

Functions
Graph Interpretation
Composition of Functions

Formulas

g(f(x)) = g evaluated at f(x)
f(g(x)) = f evaluated at g(x)

Theorems

Function Composition Theorem

Suitable Grade Level

Grades 9-12