For which value of x is each rational expression not defined?

AI Thread Summary
The discussion centers on understanding when a rational expression is not defined, specifically using the example of 3/x. It emphasizes that a rational expression is undefined when the denominator equals zero, which occurs at x=0 in this case. Participants clarify that this concept extends to other mathematical operations, such as logarithms and square roots, where certain values also lead to undefined results. The conversation includes light-hearted comments but ultimately concludes with the user expressing gratitude for the clarification. Understanding these principles is essential for working with rational functions effectively.
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I don't get it...

For which value of x is each rational expression not defined?

a) 3/x

are you supposed to solve for x? or?
 
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What if x= 0? Have you learned how to divide by 0?
 
Wherever either the denominator turns into something you can't divide by (a.k.a zero) or some other operation becomes impossible, like a zero in a log or negative in a square root etc. Basically wherever the graph doesn't have a y-value for the x-value. in a 3/x you REALLY can tell. if you never looked at a rational function and you're used with the linears, it comes as a shock...:)
 
Chuch Norris can divide by 0...Go ask him how to.
 
He can probably spell his own first name, too.
 
Yeah probably...
 
Yeah i know how to do it now. Thanks anyways guys. Ill keep your site under favourites so if there's anything I'll be sure to give you guys a click o:)

:biggrin:
 

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