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Old December 24th, 2008, 02:36 PM
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As Krizalid said, what have you tried?

to get you started
Quote:
Originally Posted by calc_help123 View Post
F is the function defined by f(x) = (x^3-x)/(x^3-4x)

A) find the limit of f(x), as x approaches 0
try factorizing the numerator and denominator before taking the limit. see anything?

Quote:
B) FInd the zeroes of f(x)
for a rational function, the zeroes occur where the numerator is zero, provided the denominator is not zero at the same time.

Quote:
C)Write an equation for the vertical and horizontal asymptotes of the graph of f(x)
for rational functions, vertical asymptotes occur where the function is undefined, this does not include "holes" however. do you know what "holes" are?

as for horizontal asymptotes, find \lim_{x \to \infty}f(x) and \lim_{x \to - \infty}f(x). if either of those are finite, those are your horizontal asymptotes

Quote:
D)Describe the symmetry of f(x)
what types of symmetry are you familiar with? do you know what "odd" and "even" mean when describing functions. is this function either of those? something else?
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