document.write( "Question 1208403: 1. Find the domain of the expression (x^2 - 1)/x.\r
\n" ); document.write( "\n" ); document.write( "Domain = {x | x cannot be 0}.\r
\n" ); document.write( "\n" ); document.write( "2. Find domain of the expression x/(x^2 + 9).\r
\n" ); document.write( "\n" ); document.write( "The domain for question 2 does not exist over the real numbers. In later chapters, the idea of complex numbers is talked about. I say domain does not exist. \r
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Algebra.Com's Answer #846800 by ikleyn(52787)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "Your answer to (1) is correct.\r
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\n" ); document.write( "\n" ); document.write( "Your answer to (2) is incorrect.\r
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\n" ); document.write( "\n" ); document.write( "The correct answer to (2) is \"the domain is the set of all real numbers\",\r
\n" ); document.write( "\n" ); document.write( "or any other equivalent form to say it.\r
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\n" ); document.write( "\n" ); document.write( "Comment from student :   Are you saying that the answer to question 2 should be domain = (-infinity, infinity)?\r
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\n" ); document.write( "\n" ); document.write( "My response :   Why do you ask again ?   Isn't my answer complete and clear?\r
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