document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1099119>Question 1099119</A>: <I><SPAN STYLE=\"word-break: break-all;\"> given that 4,12,x,y,324,972 is a geometrical sequence. find the sum of x and y </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #713511 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=713511\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> geometris sequence formula is An = A1 * r^(n-1)\r<BR>\n" );
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document.write( "A1 is equal to 4, n = 1<BR>\n" );
document.write( "A2 is equal to 12, n = 2\r<BR>\n" );
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document.write( "formula from A1 to A2 becomes 12 = 4 * r^(1) which becomes 12 = 4 * r\r<BR>\n" );
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document.write( "solve for r to get r = 12/4 = 3\r<BR>\n" );
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document.write( "A3 is therefore equal to 4 * 3^2 = 36<BR>\n" );
document.write( "A4 is therefore equal to 4 * 3^3 = 108<BR>\n" );
document.write( "A5 is therefore equal to 4 * 3^4 = 324<BR>\n" );
document.write( "A6 is therefore equal to 4 * 3^5 = 972\r<BR>\n" );
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document.write( "your sequence is 4,12,36,108,324,972\r<BR>\n" );
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document.write( "x = 36<BR>\n" );
document.write( "y = 108\r<BR>\n" );
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document.write( "x + y = 144\r<BR>\n" );
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document.write( "on a recursive basis, the formula is A[n+1] = A[n]*r\r<BR>\n" );
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document.write( "since r = 3, this means the next term in the sequence is the previous term multiplied by 3\r<BR>\n" );
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document.write( "start with 4 * 3 = 12 * 3 = 36 * 3 = 108 * 3 = 324 * 3 = 972\r<BR>\n" );
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document.write( "x is the third term in the sequence<BR>\n" );
document.write( "y is the fourth term in the sequence.\r<BR>\n" );
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document.write( "x = 36<BR>\n" );
document.write( "y = 108\r<BR>\n" );
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document.write( "sum of x and y = 144.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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