Math Problem Statement

Find (f+g)(x) and (f-g)(x) using two functions given in each number.

  1. f(x)=3x+3 g(x)=-4x+1

Solution

To find (f+g)(x)(f+g)(x) and (fg)(x)(f-g)(x) using the given functions f(x)f(x) and g(x)g(x), we perform the following operations:

1. Given Functions:

  • f(x)=3x+3f(x) = 3x + 3
  • g(x)=4x+1g(x) = -4x + 1

(f+g)(x)(f+g)(x):

(f+g)(x)=f(x)+g(x)(f+g)(x) = f(x) + g(x) Substitute the expressions for f(x)f(x) and g(x)g(x): (f+g)(x)=(3x+3)+(4x+1)(f+g)(x) = (3x + 3) + (-4x + 1) Simplify: (f+g)(x)=3x4x+3+1=x+4(f+g)(x) = 3x - 4x + 3 + 1 = -x + 4

(fg)(x)(f-g)(x):

(fg)(x)=f(x)g(x)(f-g)(x) = f(x) - g(x) Substitute the expressions for f(x)f(x) and g(x)g(x): (fg)(x)=(3x+3)(4x+1)(f-g)(x) = (3x + 3) - (-4x + 1) Simplify: (fg)(x)=3x+3+4x1=7x+2(f-g)(x) = 3x + 3 + 4x - 1 = 7x + 2

Final Answers:

  • (f+g)(x)=x+4(f+g)(x) = -x + 4
  • (fg)(x)=7x+2(f-g)(x) = 7x + 2

Would you like more details or have any questions?

Here are some related questions:

  1. How do you find (fg)(x)(f \cdot g)(x) using the given functions?
  2. What is (f/g)(x)(f/g)(x) for these functions?
  3. How would (f+g)(x)(f+g)(x) change if g(x)g(x) was a quadratic function?
  4. What is the value of (f+g)(2)(f+g)(2)?
  5. How would the process differ if f(x)f(x) and g(x)g(x) were trigonometric functions?
  6. What is the graphical interpretation of (f+g)(x)(f+g)(x)?
  7. Can you express f(x)f(x) and g(x)g(x) as a single combined function?
  8. What is the domain of the function (fg)(x)(f-g)(x)?

Tip: When combining functions, always simplify the expression to its most reduced form for clarity.

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Math Problem Analysis

Mathematical Concepts

Functions
Operations on Functions

Formulas

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Theorems

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Suitable Grade Level

Grades 10-12