document.write( "Question 672495: Find all numbers for which the rational expression is underfined\r
\n" ); document.write( "\n" ); document.write( " 7
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\n" ); document.write( " 5z+1
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Algebra.Com's Answer #418075 by nerdybill(7384)\"\" \"About 
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The expression is undefined when the denominator is zero.
\n" ); document.write( "Find values of 'z' when
\n" ); document.write( "5z+1 = 0
\n" ); document.write( "5z = -1
\n" ); document.write( "z = -1/5
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\n" ); document.write( "Undefined when z = -1/5
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