document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867044>Question 867044</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the domain of the function f(x)=3x^2/x^2-49 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #522663 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=522663\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You cannot divide by zero. So <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2+-+49 ALIGN=MIDDLE  ALT=\"x%5E2+-+49\"   DISABLED_style= \"max-width:90%; height:auto;\" > cannot be zero. \r<BR>\n" );
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document.write( "If it were, then \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x-7%29%28x%2B7%29+=+0 ALIGN=MIDDLE  ALT=\"%28x-7%29%28x%2B7%29+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x-7=0 ALIGN=MIDDLE  ALT=\"x-7=0\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%2B7+=+0 ALIGN=MIDDLE  ALT=\"x%2B7+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=7 ALIGN=MIDDLE  ALT=\"x=7\"   DISABLED_style= \"max-width:90%; height:auto;\" > or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=-7 ALIGN=MIDDLE  ALT=\"x=-7\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "These two values cause the denominator to be zero. \r<BR>\n" );
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document.write( "So they must be kicked out of the domain to make sure the entire rational expression is defined.\r<BR>\n" );
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document.write( "Therefore, the domain is the set of all real numbers BUT x cannot equal -7 and x cannot equal 7. The value of x can be any other number.\r<BR>\n" );
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document.write( "In interval notation, the domain is <IMG STYLE=\"max-width:80%;\" src=\"http://www.sciweavers.org/tex2img.php?eq=%5Cleft%28-%5Cinfty%2C-7%5Cright%29%5Ccup%5Cleft%28-7%2C7%5Cright%29%5Ccup%5Cleft%287%2C%5Cinfty%5Cright%29&bc=White&fc=Black&im=jpg&fs=12&ff=arev&edit=0\" align=\"center\" border=\"0\" alt=\"\left(-\infty,-7\right)\cup\left(-7,7\right)\cup\left(7,\infty\right)\" width=\"225\" height=\"18\" /> </SPAN>\n" );
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