document.write( "Question 164694: What is the Domain fo the Rational functions?\r
\n" ); document.write( "\n" ); document.write( "f(x)=3x +1 / x+6 \r
\n" ); document.write( "\n" ); document.write( "I am not sure how to answer this. Do you do the division or is it as simple as all real number except zero will work? \n" ); document.write( "

Algebra.Com's Answer #121351 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
It's simple enough, but zero is not what you have to worry about.
\n" ); document.write( "The worry is when the denominator goes to zero because the function is then undefined.
\n" ); document.write( "In this case, the function is undeined when x+6=0, or x=-6.
\n" ); document.write( "The domain would then be all x except x=-6, or in interval notation,
\n" ); document.write( "( $\"-infinity\"$ , $\"-6\"$ )U( $\"-6\"$ , $\"infinity\"$ ) \n" ); document.write( "

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