document.write( "Question 1195162: If 7 and 189 are the first and forth terms of a geometric progression, find the sequence \n" ); document.write( "
Algebra.Com's Answer #827562 by ikleyn(52781)\"\" \"About 
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document.write( "The 4-th term of this geometric progression is  \"7%2Ar%5E3\";\r\n" );
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document.write( "so we have this equation\r\n" );
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document.write( "    \"7%2Ar%5E3\" = 189.\r\n" );
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document.write( "It implies\r\n" );
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document.write( "    \"r%5E3\" = \"189%2F7\" = 27,\r\n" );
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document.write( "    r = \"root%283%2C27%29\" = 3.\r\n" );
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document.write( "Thus the sequence is  7,  7*3 = 21,  \"7%2A3%5E2\" = 63,  \"7%2A3%5E3\" = 189.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved and explained.\r
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\n" ); document.write( "\n" ); document.write( "On geometric progressions,  see introductory lessons\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( "into your archive and use when it is needed.\r
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