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Determine if the function below has a horizontal or a slant asymptote, and explain why. \[ f(x)=\frac{-1-2 x}{3 x+5 x^{3}+4 x^{2}-3} \] Answer Attempt 1 out of 2 The function has a numerator is \( \square \) the degree of the denominator. Horizontal/Slant asymptote: \( \square \) asymptote because the degree of the Submit Answer

Ask by Boone Warner. in the United States
Feb 03,2025

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Answer

The function has a horizontal asymptote at \( y = 0 \) because the degree of the numerator is less than the degree of the denominator.

Solution

To determine whether the function \( f(x) = \frac{-1 - 2x}{3x + 5x^{3} + 4x^{2} - 3} \) has a horizontal or slant asymptote, we analyze the degrees of the numerator and the denominator. ### Step 1: Identify the Degrees - **Numerator:** The highest power of \( x \) in the numerator is \( x \), so the degree is **1**. - **Denominator:** The highest power of \( x \) in the denominator is \( x^{3} \), so the degree is **3**. ### Step 2: Compare the Degrees - **If the degree of the numerator < degree of the denominator:** The horizontal asymptote is \( y = 0 \). - **If the degree of the numerator = degree of the denominator:** The horizontal asymptote is \( y = \frac{\text{leading coefficient of numerator}}{\text{leading coefficient of denominator}} \). - **If the degree of the numerator = degree of the denominator + 1:** There is a slant (oblique) asymptote. ### Conclusion for \( f(x) \) - **Degree of Numerator (1) < Degree of Denominator (3):** - The function **has a horizontal asymptote**. - **Numerator is less than the degree of the denominator.** - **Horizontal Asymptote:** \( y = 0 \) asymptote because the degree of the numerator is less than the degree of the denominator. ### Final Answer The function has a **horizontal** asymptote. The numerator is **less than** the degree of the denominator. **Horizontal** asymptote: \( y = 0 \) asymptote because the degree of the numerator is less than the degree of the denominator.

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When analyzing the function \( f(x) = \frac{-1-2x}{3x + 5x^3 + 4x^2 - 3} \), we first identify the degrees of the numerator and denominator. The numerator is a polynomial of degree 1 (since the highest power of \( x \) is 1), and the denominator is a polynomial of degree 3 (since \( 5x^3 \) is the highest term). Since the degree of the numerator is less than the degree of the denominator, the function has a horizontal asymptote at \( y = 0 \). To summarize, the function has a horizontal asymptote at \( y = 0 \) because the degree of the numerator is less than the degree of the denominator. This means that as \( x \) approaches infinity or negative infinity, the value of \( f(x) \) approaches zero, rather than tending towards infinity, which would be the case for slant asymptotes.

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