document.write( "Question 1029022: The first term of a geometric progression is 5 and the fifth term is 1280, the common ratio is 4\r
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Algebra.Com's Answer #644125 by ikleyn(52786)\"\" \"About 
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\n" ); document.write( "The first term of a geometric progression is 5 and the fifth term is 1280, the common ratio is 4\r
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document.write( "\"a%5B8%5D\" = \"a%5B5%5D%2A4%5E3\" = 1280*64 = 81920.\r\n" );
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document.write( "To learn more on geometric progressions, see the lesson  Geometric progressions  in this site.\r\n" );
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