Math Problem Statement

The blue and black curves on the graph below represent f(x) and g(x), respectively. Find (f ∘ g)(5).

Solution

To solve (fg)(5)(f \circ g)(5), we need to find g(5)g(5) first and then use that value to find f(g(5))f(g(5)).

Step 1: Find g(5)g(5)

From the graph:

  • The black line represents the function g(x)g(x).
  • Looking at the graph, the point where x=5x = 5 on the black line corresponds to g(5)=6g(5) = -6.

Step 2: Find f(g(5))=f(6)f(g(5)) = f(-6)

  • The blue line represents the function f(x)f(x).
  • Looking at the blue line, the point where x=6x = -6 corresponds to f(6)=36f(-6) = 36.

Thus, (fg)(5)=f(g(5))=f(6)=36(f \circ g)(5) = f(g(5)) = f(-6) = 36.

The final answer is:

(fg)(5)=36(f \circ g)(5) = 36

Would you like more details or have any questions? Here are five related questions to deepen your understanding:

  1. What is the general process for solving composite functions?
  2. How do you find the inverse of a composite function (fg)1(x)(f \circ g)^{-1}(x)?
  3. How does the slope of a linear function affect its behavior on a graph?
  4. What are the domain and range of f(x)f(x) and g(x)g(x) in this example?
  5. How do you interpret the intersection point of two functions on a graph?

Tip: When working with composite functions, always evaluate the innermost function first before applying the outer function.

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Math Problem Analysis

Mathematical Concepts

Composite Functions
Graph Interpretation
Linear Functions

Formulas

(f ∘ g)(x) = f(g(x))

Theorems

Composite Function Theorem

Suitable Grade Level

Grades 9-11