Math Problem Statement

Given f(x) = 6x + 2 and g(x) = x - 5, find f(g(x)).

Solution

The problem provided is as follows:

Given:

  • f(x)=6x+2f(x) = 6x + 2
  • g(x)=x5g(x) = x - 5

We are tasked with finding f(g(x))f(g(x)), which is the composition of the functions ff and gg.

Solution:

  1. The composition f(g(x))f(g(x)) means that we substitute g(x)g(x) into f(x)f(x).

Since g(x)=x5g(x) = x - 5, substitute this into f(x)f(x): f(g(x))=f(x5)f(g(x)) = f(x - 5)

  1. Now, substitute x5x - 5 for xx in f(x)=6x+2f(x) = 6x + 2: f(x5)=6(x5)+2f(x - 5) = 6(x - 5) + 2

  2. Simplify the expression: f(x5)=6x30+2f(x - 5) = 6x - 30 + 2 f(x5)=6x28f(x - 5) = 6x - 28

Thus, the composition f(g(x))=6x28f(g(x)) = 6x - 28.

Would you like more details or have any questions?

Here are some related questions for further practice:

  1. What is g(f(x))g(f(x)) in this case?
  2. If g(x)=2x+3g(x) = 2x + 3, how does that change f(g(x))f(g(x))?
  3. How do you solve for f(g(x))f(g(x)) if both functions are quadratic?
  4. Can you find the inverse of f(x)f(x) and g(x)g(x)?
  5. How would you graph both f(x)f(x) and f(g(x))f(g(x))?

Tip: Function composition involves plugging one function into another; simplifying carefully is key!

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Math Problem Analysis

Mathematical Concepts

Algebra
Function Composition

Formulas

f(g(x)) = f(x - 5)
f(x) = 6x + 2

Theorems

Function Composition

Suitable Grade Level

Grades 9-12