Math Problem Statement

For the function f(x)=8−x3x2−4 answer each of the following questions.

Evaluate the function at the following values of x

compute (accurate to 8 decimal places).

(i) 2.5

         f(x)=

Answer 1 Question 1

(ii) 2.01

         f(x)=

Answer 2 Question 1

Solution

To evaluate the function f(x)=8x3x24f(x) = \frac{8 - x}{3x^2 - 4} at the given values of xx, we substitute x=2.5x = 2.5 and x=2.01x = 2.01 into the equation.

1. Evaluating f(2.5)f(2.5):

f(2.5)=82.53(2.5)24f(2.5) = \frac{8 - 2.5}{3(2.5)^2 - 4} Calculate the numerator and the denominator separately:

  • Numerator: 82.5=5.58 - 2.5 = 5.5
  • Denominator: 3(2.5)24=3(6.25)4=18.754=14.753(2.5)^2 - 4 = 3(6.25) - 4 = 18.75 - 4 = 14.75

Thus: f(2.5)=5.514.750.37288136f(2.5) = \frac{5.5}{14.75} \approx 0.37288136

2. Evaluating f(2.01)f(2.01):

f(2.01)=82.013(2.01)24f(2.01) = \frac{8 - 2.01}{3(2.01)^2 - 4} Calculate the numerator and the denominator separately:

  • Numerator: 82.01=5.998 - 2.01 = 5.99
  • Denominator: 3(2.01)24=3(4.0401)4=12.12034=8.12033(2.01)^2 - 4 = 3(4.0401) - 4 = 12.1203 - 4 = 8.1203

Thus: f(2.01)=5.998.12030.73771277f(2.01) = \frac{5.99}{8.1203} \approx 0.73771277

Answers:

(i) f(2.5)0.37288136f(2.5) \approx 0.37288136

(ii) f(2.01)0.73771277f(2.01) \approx 0.73771277

Would you like further details or have any questions?

Here are five additional related questions:

  1. What is the domain of the function f(x)=8x3x24f(x) = \frac{8 - x}{3x^2 - 4}?
  2. What happens to f(x)f(x) as xx approaches 0?
  3. Can we find the asymptotes of f(x)f(x)? If so, what are they?
  4. How would you determine if the function has any points of discontinuity?
  5. What is the behavior of f(x)f(x) as xx \to \infty?

Tip: When evaluating functions, always calculate the numerator and denominator separately for clarity and accuracy.

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Math Problem Analysis

Mathematical Concepts

Algebra
Rational Functions
Function Evaluation

Formulas

f(x) = (8 - x) / (3x^2 - 4)

Theorems

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Suitable Grade Level

Grades 9-12