Find the horizontal asymptote of each function. f(x)=(2x+3)2−5x
A
Horizontal Asymptote at y=0
B
Horizontal Asymptote at y=−45
C
Horizontal Asymptote at y=−25
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1
Identify the degrees of the polynomial in the numerator and the denominator. The degree of the numerator is 1 (since the highest power of x is x^1), and the degree of the denominator is 2 (since the highest power of x is (2x)^2).
Recall the rule for finding horizontal asymptotes: If the degree of the numerator is less than the degree of the denominator, the horizontal asymptote is y = 0.
Since the degree of the numerator (1) is less than the degree of the denominator (2), the horizontal asymptote is y = 0.
Verify by considering the behavior of the function as x approaches infinity. As x becomes very large, the term with the highest degree in the denominator will dominate, causing the function to approach zero.
Conclude that the horizontal asymptote of the function f(x) = \(\frac{-5x}{(2x+3)^2}\) is y = 0.