Math Problem Statement

Given that f(x) = 6x - 5 and g(x) = 7 - x^2, calculate (a) f(g(0)) and (b) g(f(0)).

Solution

Let's solve the two parts of the problem step by step.

Given:

  • f(x)=6x5f(x) = 6x - 5
  • g(x)=7x2g(x) = 7 - x^2

(a) f(g(0))f(g(0))

  1. First, calculate g(0)g(0): g(0)=7(0)2=7g(0) = 7 - (0)^2 = 7

  2. Now, substitute g(0)=7g(0) = 7 into f(x)f(x): f(g(0))=f(7)=6(7)5=425=37f(g(0)) = f(7) = 6(7) - 5 = 42 - 5 = 37

So, f(g(0))=37f(g(0)) = 37.

(b) g(f(0))g(f(0))

  1. First, calculate f(0)f(0): f(0)=6(0)5=5f(0) = 6(0) - 5 = -5

  2. Now, substitute f(0)=5f(0) = -5 into g(x)g(x): g(f(0))=g(5)=7(5)2=725=18g(f(0)) = g(-5) = 7 - (-5)^2 = 7 - 25 = -18

So, g(f(0))=18g(f(0)) = -18.

Final Answers:

  • (a) f(g(0))=37f(g(0)) = 37
  • (b) g(f(0))=18g(f(0)) = -18

Would you like more details on any step?

Here are 5 related questions you might find interesting:

  1. What is the general process for calculating the composition of two functions?
  2. How would you solve g(f(x))g(f(x)) if given a different function for f(x)f(x)?
  3. What happens if you reverse the order of function composition, such as calculating f(g(x))f(g(x)) instead of g(f(x))g(f(x))?
  4. Can you graph the functions f(x)=6x5f(x) = 6x - 5 and g(x)=7x2g(x) = 7 - x^2 to visualize the results?
  5. What are the domain and range for the composite function f(g(x))f(g(x))?

Tip: When working with composite functions, always solve from the inside out, starting with the innermost function.

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Math Problem Analysis

Mathematical Concepts

Function Composition
Quadratic Functions
Linear Functions

Formulas

f(x) = 6x - 5
g(x) = 7 - x^2

Theorems

Composition of Functions

Suitable Grade Level

Grades 9-10