Math Problem Statement

Tentukan asimtot tegak grafik fungsi f(x) = (x^2 - x - 2) / (x^2 + x - 6)

Solution

The problem is asking to find the vertical asymptotes of the given function:

f(x)=x2x2x2+x6f(x) = \frac{x^2 - x - 2}{x^2 + x - 6}

Step 1: Factor both the numerator and the denominator.

  • The numerator x2x2x^2 - x - 2 can be factored as: x2x2=(x2)(x+1)x^2 - x - 2 = (x - 2)(x + 1)

  • The denominator x2+x6x^2 + x - 6 can be factored as: x2+x6=(x2)(x+3)x^2 + x - 6 = (x - 2)(x + 3)

Thus, the function becomes: f(x)=(x2)(x+1)(x2)(x+3)f(x) = \frac{(x - 2)(x + 1)}{(x - 2)(x + 3)}

Step 2: Cancel out common factors (if any).

There is a common factor of x2x - 2 in both the numerator and the denominator, so we cancel it out, leaving: f(x)=x+1x+3forx2f(x) = \frac{x + 1}{x + 3} \quad \text{for} \quad x \neq 2

Step 3: Determine the vertical asymptotes.

Vertical asymptotes occur when the denominator is zero, provided the factor does not cancel out with the numerator. For this function, the denominator is x+3x + 3. Setting it equal to zero: x+3=0x + 3 = 0 x=3x = -3

Thus, there is a vertical asymptote at x=3x = -3.

Conclusion:

The correct answer is:

a. x=3x = -3


Would you like more details or have any questions?

Here are 5 related questions for practice:

  1. What is the horizontal asymptote of the function f(x)=x+1x+3f(x) = \frac{x+1}{x+3}?
  2. How do you find horizontal asymptotes of a rational function?
  3. Can a rational function have more than one vertical asymptote?
  4. What is the domain of the function f(x)=x+1x+3f(x) = \frac{x+1}{x+3}?
  5. What happens to the function as xx approaches the vertical asymptote?

Tip: Vertical asymptotes occur when the denominator is zero and the factor doesn't cancel with the numerator!

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Math Problem Analysis

Mathematical Concepts

Algebra
Rational Functions
Vertical Asymptotes
Factoring Quadratics

Formulas

Vertical asymptote: Set denominator equal to zero (provided the factor does not cancel out)
Factoring Quadratics: ax^2 + bx + c = (x - r1)(x - r2)

Theorems

Asymptote Theorem for Rational Functions

Suitable Grade Level

Grades 9-12