Math Problem Statement

the asymptotes are wrong

Solution

Let's re-evaluate the asymptotes for the given function f(x)=7exex6f(x) = \frac{7e^x}{e^x - 6}.

Horizontal Asymptotes

To find the horizontal asymptotes, we analyze the behavior of the function as xx approaches \infty and -\infty.

As xx \to \infty: limx7exex6\lim_{x \to \infty} \frac{7e^x}{e^x - 6} Divide the numerator and the denominator by exe^x: limx7ex/ex(ex6)/ex=limx716/ex\lim_{x \to \infty} \frac{7e^x / e^x}{(e^x - 6) / e^x} = \lim_{x \to \infty} \frac{7}{1 - 6 / e^x} As xx \to \infty, 6ex0\frac{6}{e^x} \to 0, so the limit is: 710=7\frac{7}{1 - 0} = 7 Thus, there is a horizontal asymptote at y=7y = 7.

As xx \to -\infty: limx7exex6\lim_{x \to -\infty} \frac{7e^x}{e^x - 6} As xx \to -\infty, ex0e^x \to 0. Therefore: limx7006=06=0\lim_{x \to -\infty} \frac{7 \cdot 0}{0 - 6} = \frac{0}{-6} = 0 Thus, there is a horizontal asymptote at y=0y = 0.

Vertical Asymptotes

To find vertical asymptotes, we look for values of xx where the denominator is zero and the numerator is non-zero.

Setting the denominator equal to zero: ex6=0e^x - 6 = 0 ex=6e^x = 6 Taking the natural logarithm of both sides: x=ln(6)x = \ln(6)

At x=ln(6)x = \ln(6), the function's denominator is zero, which suggests a vertical asymptote at this point. We need to ensure the numerator does not also go to zero here: 7ex0 for any real x7e^x \neq 0 \text{ for any real } x

Therefore, there is a vertical asymptote at: x=ln(6)x = \ln(6)

Summary of Corrected Asymptotes

  1. Horizontal Asymptotes:

    • y=7y = 7
    • y=0y = 0
  2. Vertical Asymptote:

    • x=ln(6)x = \ln(6)

Would you like more details or have any questions about these steps?


Here are 5 questions you might ask next:

  1. How do you determine if a limit results in an indeterminate form?
  2. Can you explain the concept of horizontal and vertical asymptotes further?
  3. How do you find limits as xx approaches infinity or negative infinity?
  4. What are some techniques for solving exponential equations?
  5. Can you graph the function f(x)=7exex6f(x) = \frac{7e^x}{e^x - 6}?

Tip: When dealing with exponential functions, always check the behavior at infinity and negative infinity to accurately determine the horizontal asymptotes.

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Math Problem Analysis

Mathematical Concepts

Limits
Exponential Functions
Asymptotes

Formulas

Limit definition
Exponential function behavior

Theorems

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Suitable Grade Level

Advanced High School