Discussion:  All Topics in PreCalculus for Properties of Rational Functions 
Topic:  Need some quick help 
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Subject:  Need some quick help 
Author:  Tryin 
Date:  Jul 31 2004 
I have just went out and purchased some software to help educate myself with
Algabra. However, I do need some quick help on the following problems. If
anyone can help me, It would be deeply appreciated. I'm trying to help my kid
but I am not doing a good job at all. Thanks
1. Which of the following are functions? Explain your reasoning for a, b, and
c.
a. f(x) = 2 if x>1
f(x) = 1 otherwise
b. f(x) = 5 if x>0
f(x) = 5 if x<0
f(x) = 5 or 5 if x = 0
c. f(x) = 10/x
 
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