Math Problem Statement

Use the functions f(x) = x^2 + x - 6 and g(x) = 2x - 1 to evaluate g(f(5)).

Solution

The visible portion of the uploaded image contains the following functions and task:

Functions:

  • f(x)=x2+x6f(x) = x^2 + x - 6
  • g(x)=2x1g(x) = 2x - 1

Task:

  • Evaluate g(f(5))g(f(5)) (Find the value of g(f(5))g(f(5))).

Let's solve it step by step.


Step 1: Find f(5)f(5)

Substitute x=5x = 5 into f(x)=x2+x6f(x) = x^2 + x - 6:

f(5)=52+56=25+56=24f(5) = 5^2 + 5 - 6 = 25 + 5 - 6 = 24

So, f(5)=24f(5) = 24.


Step 2: Find g(f(5))g(f(5)), which is g(24)g(24)

Substitute x=24x = 24 into g(x)=2x1g(x) = 2x - 1:

g(24)=2(24)1=481=47g(24) = 2(24) - 1 = 48 - 1 = 47

So, g(f(5))=47g(f(5)) = 47.


Final Answer:

g(f(5))=47g(f(5)) = 47

Would you like a detailed explanation of the steps or have any other questions?


Related Questions:

  1. How do you evaluate g(f(2))g(f(-2)) using these functions?
  2. What happens if you reverse the operations, finding f(g(5))f(g(5))?
  3. Can you factor f(x)=x2+x6f(x) = x^2 + x - 6, and what are its roots?
  4. What is the domain and range of g(x)=2x1g(x) = 2x - 1?
  5. What is the composite function g(f(x))g(f(x)), and how is it simplified?

Tip:

Always substitute carefully, step by step, to avoid errors when working with composite functions!

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Math Problem Analysis

Mathematical Concepts

Function Composition
Substitution

Formulas

f(x) = x^2 + x - 6
g(x) = 2x - 1

Theorems

Function Evaluation and Composition

Suitable Grade Level

Grades 9-10