Math Problem Statement

Evaluate the function at the indicated values. (If an answer is undefined, enter UNDEFINED.) f(x+1) = 6|x − 4|

Solution

To evaluate the function f(x+1)=6x4f(x+1) = 6|x - 4| at given values, let’s break down the process:

Step 1: Understanding the function

The function is f(x+1)=6x4f(x+1) = 6|x - 4|, where x4|x - 4| represents the absolute value of x4x - 4.

Step 2: Evaluating the function at different values

Let’s substitute different values for x+1x+1 (the argument of the function) and compute the corresponding results.

1. For f(0)f(0):

We set x+1=0x+1 = 0. Therefore, x=1x = -1. Now substitute x=1x = -1 into the function: f(0)=614=65=6×5=30f(0) = 6|-1 - 4| = 6| -5 | = 6 \times 5 = 30 So, f(0)=30f(0) = 30.

2. For f(2)f(2):

We set x+1=2x+1 = 2. Therefore, x=1x = 1. Now substitute x=1x = 1 into the function: f(2)=614=63=6×3=18f(2) = 6|1 - 4| = 6| -3 | = 6 \times 3 = 18 So, f(2)=18f(2) = 18.

3. For f(5)f(5):

We set x+1=5x+1 = 5. Therefore, x=4x = 4. Now substitute x=4x = 4 into the function: f(5)=644=60=6×0=0f(5) = 6|4 - 4| = 6|0| = 6 \times 0 = 0 So, f(5)=0f(5) = 0.

4. For f(6)f(6):

We set x+1=6x+1 = 6. Therefore, x=5x = 5. Now substitute x=5x = 5 into the function: f(6)=654=61=6×1=6f(6) = 6|5 - 4| = 6|1| = 6 \times 1 = 6 So, f(6)=6f(6) = 6.

5. For f(8)f(8):

We set x+1=8x+1 = 8. Therefore, x=7x = 7. Now substitute x=7x = 7 into the function: f(8)=674=63=6×3=18f(8) = 6|7 - 4| = 6|3| = 6 \times 3 = 18 So, f(8)=18f(8) = 18.

Final Answers:

  • f(0)=30f(0) = 30
  • f(2)=18f(2) = 18
  • f(5)=0f(5) = 0
  • f(6)=6f(6) = 6
  • f(8)=18f(8) = 18

Would you like a more detailed explanation or have any questions?


Here are 5 related questions to deepen your understanding:

  1. What is the general behavior of absolute value functions?
  2. How does shifting the input of a function by 1 affect its graph?
  3. What happens to the function if we change the constant multiplier (e.g., from 6 to 3)?
  4. How would you solve for xx if the function was set equal to a specific value, say f(x+1)=12f(x+1) = 12?
  5. How can you find the vertex of the absolute value function in this case?

Tip: Absolute value functions create a "V" shape on a graph, with a turning point at the value that makes the expression inside the absolute value zero.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Functions
Function Evaluation

Formulas

f(x+1) = 6|x - 4|
Absolute value formula |x|

Theorems

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Suitable Grade Level

Grades 9-10