Find horizontal asymptote(s) and vertical asymptote(s) of..

Jade

Junior Member
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Sep 16, 2006
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Find horizontal asymptote(s) and vertical asymptote(s) of the function

f(x) = -3x^2 + 2x - 1 / x^2 + 2x - 15

:shock:
 
What you have posted means the following:

. . . . .\(\displaystyle \L f(x)\, =\, -3x^2\, + \,2x\, - \,\frac{1}{x^2}\, +\, 2x\, - \, 15\)

Is that what you meant? Or did you mean this?

. . . . .\(\displaystyle \L f(x)\, =\, \frac{-3x^2\, + \, 2x\, - \, 1}{x^2\, +\, 2x\, - \, 15}\)

Or something else...?

Finding the vertical and horizontal asymptotes is fairly formulaic and was covered back in algebra. Where are you stuck?

Please be specific. Thank you.

Eliz.
 
\(\displaystyle \L\\f(x)=\frac{-3x^{2}+2x-1}{x^{2}+2x-15}\)


To find the vertical asymptotes, find what makes the denominator equal to 0.

For the horizontal asymptote, what does f(x) approach as x approaches +/- infinity?.

Another observation: Since the power of the numerator and the denominator are the same, the ratio of the leading coefficients is a horizontal asymptote.
 
Thanks for the refresh

Vertical
x^2+2x-15=0
(x+5)(x-2)
x=-5 and 2


Horizontal
-3 because that is leading coefficient when the power of the num and den are the same
 
No!. That's not it. What's wrong with you?.



Ha ha. Just kidding. That's correct. Very good. :D
 
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