Questions: b) f(x)=(x^3-6x^2-3x+18)/(x^2-4x-12) Hole(s): x-intercept(s): y-intercept: VA(s): HA/Slant: Domain and Range:

b) f(x)=(x^3-6x^2-3x+18)/(x^2-4x-12)

Hole(s):
x-intercept(s):
y-intercept:

VA(s):
HA/Slant:

Domain and Range:
Transcript text: b) $f(x)=\frac{x^{3}-6 x^{2}-3 x+18}{x^{2}-4 x-12}$ Hole(s): x-intercept(s): $y$-intercept: VA(s): HA/Slant: Domain and Range:
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Solution

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Solution Steps

To solve the given problem, we need to analyze the rational function \( f(x) = \frac{x^3 - 6x^2 - 3x + 18}{x^2 - 4x - 12} \). Here are the steps to find the required information:

  1. Holes: Find common factors in the numerator and denominator and set them to zero.
  2. x-intercepts: Set the numerator equal to zero and solve for \( x \).
  3. y-intercept: Evaluate \( f(0) \).
  4. Vertical Asymptotes (VA): Set the denominator equal to zero and solve for \( x \).
  5. Horizontal Asymptote (HA) or Slant Asymptote: Compare the degrees of the numerator and denominator.
Step 1: Finding Holes

The hole in the function occurs where the common factors of the numerator and denominator are equal to zero. From the calculations, we find that there is a hole at: \[ x = 6 \]

Step 2: Finding x-intercepts

The x-intercepts are found by setting the numerator equal to zero. The solutions are: \[ x = 6, \quad x = -\sqrt{3}, \quad x = \sqrt{3} \]

Step 3: Finding the y-intercept

The y-intercept is found by evaluating the function at \( x = 0 \): \[ f(0) = -\frac{3}{2} \]

Step 4: Finding Vertical Asymptotes

The vertical asymptotes occur where the denominator is equal to zero. The solutions are: \[ x = -2, \quad x = 6 \]

Step 5: Finding Horizontal or Slant Asymptotes

The degrees of the numerator and denominator are compared. Since the degree of the numerator (3) is greater than the degree of the denominator (2), there is a slant asymptote. The slant asymptote can be found by performing polynomial long division, but for this case, we note that it exists without calculating its exact form.

Final Answer

  • Holes: \( \boxed{x = 6} \)
  • x-intercepts: \( \boxed{x = 6, \, -\sqrt{3}, \, \sqrt{3}} \)
  • y-intercept: \( \boxed{y = -\frac{3}{2}} \)
  • Vertical Asymptotes: \( \boxed{x = -2, \, 6} \)
  • Slant Asymptote: Exists (not calculated explicitly).
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