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Give an example of a rational function that has a horizontal asymptote at y = 0 and a vertical asymptote atx = 2 and x = 1.

Sagot :

Solution

Step 1

Horizontal Asymptotes of Rational Functions

The horizontal asymptote of a rational function can be determined by looking at the degrees of the numerator and denominator.

If N is the degree of the numerator and D is the degree of the denominator, and…

N < D, then the horizontal asymptote is y = 0.

N = D, then the horizontal asymptote is y = ratio of leading coefficients.

N > D, then there is no horizontal asymptote.

Step 2

Identify Vertical Asymptotes of a Rational Function

Factor the numerator and denominator.

Simplify by canceling common factors in the numerator and the denominator.

Set the simplified denominator equal to zero and solve for x.

Step 3

x = 2 and x = 1

x - 2 and x - 1

The denominator expression will be (x-2)(x-1)

Step 4

[tex]\begin{gathered} The\text{ rational fraction is} \\ \\ y=\frac{1}{(x-2)(x-1)} \end{gathered}[/tex]

Final answer

[tex]y\text{ = }\frac{1}{(x-2)(x-1)}[/tex]