Math Problem Statement

Given f(x)=13(2−x)2f(x)=13(2−x)2, what is the value of f(8)f(8)?

Solution

To find the value of f(8)f(8) for the function f(x)=13(2x)2f(x) = 13(2 - x)^2, we substitute x=8x = 8 into the function:

f(8)=13(28)2f(8) = 13(2 - 8)^2

Calculating 282 - 8:

28=62 - 8 = -6

Now, square 6-6:

(6)2=36(-6)^2 = 36

Then, multiply by 13:

f(8)=13×36=468f(8) = 13 \times 36 = 468

Thus, the value of f(8)f(8) is 468468.

If you have any questions or need further details, feel free to ask! Here are some related questions:

  1. What is the general form of f(x)f(x)?
  2. How does changing xx affect the value of f(x)f(x)?
  3. What is the value of f(0)f(0)?
  4. Can you find the vertex of the parabola represented by f(x)f(x)?
  5. How would the function change if the coefficient before (2x)2(2 - x)^2 were different?

Tip: Always check the behavior of functions at critical points to understand their shape!

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Quadratic Functions

Formulas

f(x) = a(2 - x)²

Theorems

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Suitable Grade Level

Grades 6-8