document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=20942>Question 20942</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the seventh term of the expansion (2a-3b) to the ninth power? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #12164 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=12164\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 7 TH TERM OF (2A-3B)^9<BR>\n" );
document.write( "AS PER BINOMIAL THEOREM R+1 ST. TERM Tr+1 OF EXPANSION (X+A)^N IS GIVEN BY<BR>\n" );
document.write( "Tr+1=nCr*{X^(N-R)}*(A^R) ..WE WANT 7TH.TERM HENCE R=6...SO <BR>\n" );
document.write( "T7=9C6*{(2A)^(9-6)}*(3B)^6<BR>\n" );
document.write( "=9C6*8*A^3*3^6*B^6<BR>\n" );
document.write( "=(9!/6!*3!)*8*A^3*3^6*B^6<BR>\n" );
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