document.write( "Question 1166362: GIVE WHAT IS ASKED IN THE PROBLEM. SHOW YOUR COMPLETE SOLUTION:\r
\n" ); document.write( "\n" ); document.write( "LINDA STARTS A CHAIN LETTER AND SENDS IT TO THREE FRIENDS. EACH OF THE FRIENDS SENDS THE LETTER TO 3 OTHER FRIENDS AND THE SEQUENCE IS REPEATED. ASSUMING THAT NO ONE BREAKS THE CHAIN, HOW MANY LETTERS WILL HAVE BEEN SENT FROM THE FIRST TO THE SIXTH MAILINGS?
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Algebra.Com's Answer #790857 by ikleyn(52781)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "            I just answered this question once,  but it came again.\r
\n" ); document.write( "\n" ); document.write( "            Ok,  I will explain one more time.\r
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document.write( "Mailing               1    2    3    4    5    6\r\n" );
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document.write( "number of letters     1    3    3^2  3^3  3^4  3^5\r\n" );
document.write( "   sent\r\n" );
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document.write( "The total = 1 + 3 + 3^2 + 3^3 + 3^4 + 3^5.\r\n" );
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document.write( "Use your calculator.\r\n" );
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document.write( "Or, alternatively,  use the formula for the sum of the first 6 terms of an geometric progression \r\n" );
document.write( "with the first term of 1 and the common ratio of 3.\r\n" );
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\n" ); document.write( "\n" ); document.write( "To learn the formula for summing, see introductory lessons on geometric progressions\r
\n" ); document.write( "\n" ); document.write( "    - Geometric progressions\r
\n" ); document.write( "\n" ); document.write( "    - The proofs of the formulas for geometric progressions \r
\n" ); document.write( "\n" ); document.write( "    - Problems on geometric progressions\r
\n" ); document.write( "\n" ); document.write( "    - Word problems on geometric progressions\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-II in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
\n" ); document.write( "https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "Do not use all CAPS in your writing --- do not try to scare me . . . \r
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\n" ); document.write( "\n" ); document.write( "If you really scare me,  then everything will be much worst . . . \r
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