Math Problem Statement

let f(x)=3x+2 and g(x)=-x, find g(f(x))

Solution

To find g(f(x))g(f(x)), we need to substitute f(x)f(x) into g(x)g(x).

Given: f(x)=3x+2f(x) = 3x + 2 g(x)=xg(x) = -x

First, calculate f(x)f(x): f(x)=3x+2f(x) = 3x + 2

Now, substitute f(x)f(x) into g(x)g(x): g(f(x))=g(3x+2)g(f(x)) = g(3x + 2) Since g(x)=xg(x) = -x, substitute xx with 3x+23x + 2: g(3x+2)=(3x+2)g(3x + 2) = -(3x + 2) Simplify: g(f(x))=3x2g(f(x)) = -3x - 2

So, g(f(x))=3x2g(f(x)) = -3x - 2.

Would you like further details or have any questions?

Here are 5 related questions to expand on this topic:

  1. What is the result of f(g(x))f(g(x)) given the same functions?
  2. How do you find the inverse of f(x)f(x)?
  3. What does the composition of two functions represent in terms of their graphs?
  4. Can you find g(f(1))g(f(-1))?
  5. How do you determine if two functions are inverses of each other?

Tip: When working with function compositions, remember to carefully substitute the entire expression for the inner function into the outer function.

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Math Problem Analysis

Mathematical Concepts

Function composition
Substitution

Formulas

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Theorems

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Suitable Grade Level

Grades 10-12