Math Problem Statement

State the domain, vertical asymptote, and end behavior of the function.

h(x)=−log(3x−8)+6

Solution

Let's analyze the function h(x)=log(3x8)+6h(x) = -\log(3x - 8) + 6 to find its domain, vertical asymptote, and end behavior.

1. Domain:

The function involves a logarithmic expression log(3x8)\log(3x - 8), and the argument of the logarithm must be strictly positive, meaning:

3x8>03x - 8 > 0

Solve for xx:

3x>8x>833x > 8 \quad \Rightarrow \quad x > \frac{8}{3}

Thus, the domain of h(x)h(x) is:

x>83x > \frac{8}{3}

or in interval notation:

(83,)\boxed{ \left( \frac{8}{3}, \infty \right) }

2. Vertical Asymptote:

A vertical asymptote occurs where the argument of the logarithm approaches zero, which happens when 3x8=03x - 8 = 0. Solve for xx:

3x=8x=833x = 8 \quad \Rightarrow \quad x = \frac{8}{3}

Thus, the vertical asymptote is:

x=83\boxed{ x = \frac{8}{3} }

3. End Behavior:

To analyze the end behavior, we examine how h(x)h(x) behaves as xx \to \infty.

  • As xx \to \infty, 3x83x - 8 \to \infty, so log(3x8)\log(3x - 8) \to \infty.
  • Since h(x)=log(3x8)+6h(x) = -\log(3x - 8) + 6, the logarithmic part grows large, but the negative sign flips the behavior. Hence, log(3x8)-\log(3x - 8) \to -\infty.
  • Adding 6 gives h(x)h(x) \to -\infty as xx \to \infty.

So, the end behavior is:

limxh(x)=\boxed{ \lim_{x \to \infty} h(x) = -\infty }

Summary:

  • Domain: (83,)\left( \frac{8}{3}, \infty \right)
  • Vertical Asymptote: x=83x = \frac{8}{3}
  • End Behavior: As xx \to \infty, h(x)h(x) \to -\infty.

Do you need further clarification or details?

Here are 5 related questions to deepen understanding:

  1. How does the vertical asymptote affect the graph of a logarithmic function?
  2. What happens to the graph of h(x)h(x) as xx approaches the vertical asymptote from the right?
  3. How would the domain change if the logarithmic expression had a different base?
  4. How does adding or subtracting constants outside the logarithm affect the graph of the function?
  5. What if the argument of the logarithmic function had a negative coefficient? How would that impact the graph?

Tip: Always check the argument of a logarithmic function to ensure it remains positive to determine the domain correctly.

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Math Problem Analysis

Mathematical Concepts

Logarithmic Functions
Domain
Asymptotes
End Behavior

Formulas

logarithmic function formula log_b(x)
Vertical asymptote condition: log argument = 0
End behavior as x -> infinity

Theorems

Properties of Logarithmic Functions
Vertical Asymptote Theorem

Suitable Grade Level

Grades 11-12