document.write( "Question 750818: how can you make sure that a rational expression does not get undefined? \n" ); document.write( "

Algebra.Com's Answer #456807 by jim_thompson5910(35256) $\"\"$ $\"About$

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To make sure it never gets undefined, you have to exclude all values of the variable that make the denominator zero. \n" ); document.write( "

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