document.write( "Question 476980: Find all numbers for which the rational expression is undefined.
\n" ); document.write( "1/z-1 \n" ); document.write( "

Algebra.Com's Answer #327038 by MathLover1(20850) $\"\"$ $\"About$

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\n" ); document.write( "A $\"rational\"$ $\"+expression\"$ is a quotient of two expressions. A rational expression can also be considered as a division; when simplifying a single rational expression, divide the numerator by the denominator.\r
\n" ); document.write( "\n" ); document.write( "For any rational number or rational expression, the number or expression is $\"undefined\"$ $\"+if\"$ the $\"denominator\"$ is $\"equal\"$ to $\"0\"$ .\r
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\n" ); document.write( "\n" ); document.write( "so, $\"rational\"$ $\"+expression\"$ $\"1%2F%28z-1%29\"$ is $\"undefined\"$ if $\"z-1=0\"$ or $\"z=1\"$ . \n" ); document.write( "

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