document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=288488>Question 288488</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A is a 2x3 matrix and B a 3x2 matrix   is A-B defined\r<BR>\n" );
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document.write( "A is invertible 3x3 matrix B is 3x4 matrix   is A to the -1 power B defined\r<BR>\n" );
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document.write( "A is 3x4 matrix and B is 3x4 matrix   is A+B defined \r<BR>\n" );
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document.write( "I do not understand what is meant my defined<BR>\n" );
document.write( "thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #209108 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=209108\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A is a 2x3 matrix and B a 3x2 matrix is A-B defined?<BR>\n" );
document.write( "Ans: No because the dimensions are not the same.<BR>\n" );
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document.write( "A is invertible 3x3 matrix B is 3x4 matrix is A to the -1 power B defined<BR>\n" );
document.write( "Ans: Yes because the \"inner\" dimensions are the same.<BR>\n" );
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document.write( "A is 3x4 matrix and B is 3x4 matrix is A+B defined?<BR>\n" );
document.write( "Ans: Yes because the dimensions are the same.<BR>\n" );
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document.write( "I do not understand what is meant my defined<BR>\n" );
document.write( "For these problems \"defined\" means you can perform the operation.<BR>\n" );
document.write( "\"Not defined\" means you cannot carry out the operation.<BR>\n" );
document.write( "The operations are multiplication of addition.<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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