Math Problem Statement

Find (f+g)(x) and (f-g)(x) using two functions given in each number. 2. f(x)=5x+1 g(x)=-2+3x

Solution

To find (f+g)(x)(f+g)(x) and (fg)(x)(f-g)(x) using the functions f(x)=5x+1f(x) = 5x + 1 and g(x)=2+3xg(x) = -2 + 3x, follow these steps:

1. Find (f+g)(x)(f+g)(x):

(f+g)(x)=f(x)+g(x)(f+g)(x) = f(x) + g(x) Substitute the given functions: (f+g)(x)=(5x+1)+(2+3x)(f+g)(x) = (5x + 1) + (-2 + 3x) Combine like terms: (f+g)(x)=5x+3x+12=8x1(f+g)(x) = 5x + 3x + 1 - 2 = 8x - 1 So, (f+g)(x)=8x1(f+g)(x) = 8x - 1

2. Find (fg)(x)(f-g)(x):

(fg)(x)=f(x)g(x)(f-g)(x) = f(x) - g(x) Substitute the given functions: (fg)(x)=(5x+1)(2+3x)(f-g)(x) = (5x + 1) - (-2 + 3x) Distribute the negative sign: (fg)(x)=5x+1+23x(f-g)(x) = 5x + 1 + 2 - 3x Combine like terms: (fg)(x)=5x3x+1+2=2x+3(f-g)(x) = 5x - 3x + 1 + 2 = 2x + 3 So, (fg)(x)=2x+3(f-g)(x) = 2x + 3

Summary:

  • (f+g)(x)=8x1(f+g)(x) = 8x - 1
  • (fg)(x)=2x+3(f-g)(x) = 2x + 3

Would you like more details or have any questions?

Here are five related questions to further explore this topic:

  1. How would you find (f×g)(x)(f \times g)(x) using the same functions?
  2. What is the graph of (f+g)(x)(f+g)(x) and (fg)(x)(f-g)(x)?
  3. How do you find the domain and range of (f+g)(x)(f+g)(x) and (fg)(x)(f-g)(x)?
  4. What happens if you divide f(x)f(x) by g(x)g(x) and find fg(x)\frac{f}{g}(x)?
  5. Can you solve for the values of xx where (f+g)(x)=0(f+g)(x) = 0 and (fg)(x)=0(f-g)(x) = 0?

Tip: When subtracting one function from another, carefully distribute the negative sign across all terms to avoid mistakes.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Functions
Algebra
Operations on Functions

Formulas

-

Theorems

-

Suitable Grade Level

Grades 9-12