document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=222736>Question 222736</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi again, just wanted t know if the question I have been asking has something wrong with it, because I havnt received any kind of response to it at all. If not can someone please help me. The following questions are for two seperate hypothetical matrices.<BR>\n" );
document.write( "Here they are again:<BR>\n" );
document.write( "Suppose MATRIX AB is defined.<BR>\n" );
document.write( "a) If A is 4*6 and B is a column matrix, give the dimensions of B and AB.<BR>\n" );
document.write( "b) (different matrix) If A is the identity matrix and B is 6*6, what size is A?<BR>\n" );
document.write( "Thanks, -Nick. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #166709 by </B><A HREF=/tutors/aboutme.mpl?userid=user_dude2008><B>user_dude2008(1862)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=user_dude2008><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=166709\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) If A is 4 x 6, then B is 6 x 1 (inner dimensions must match)\r<BR>\n" );
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document.write( "So AB is 4 x 1\r<BR>\n" );
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document.write( "b) \"A is the identity matrix \" --> A is square (num rows = num columns)\r<BR>\n" );
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document.write( "Since AB is defined, A is 6 x 6 also since inner dimensions must match </SPAN>\n" );
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