Question 1181032
<font face="Times New Roman" size="+2">


A rational function is defined everywhere except where the denominator evaluates to zero.  Set the denominator polynomial equal to zero and solve.  The domain of the original function is all real numbers except for the zeros of the denominator.


																
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
*[illustration darwinfish.jpg]

From <https://www.algebra.com/cgi-bin/upload-illustration.mpl> 
I > Ø
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
</font>