document.write( "Question 840087: Trying to find the patterns of;
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\n" ); document.write( "1, 2, 20, 40, ? \n" ); document.write( "

Algebra.Com's Answer #505950 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "1, 1, 9, 9,\r\n" );
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document.write( "Two 1's then two 9's, then 2 1's, then two 9's, over and over, etc.\r\n" );
document.write( "That is:\r\n" );
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document.write( "1, 1, 9, 9, 1, 1, 9, 9, 1, 1, 9, 9, 1, 1, 9, 9,...\r\n" );
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document.write( "1, 9, 9, 81, \r\n" );
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document.write( "The first two terms are 1 and 9.\r\n" );
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document.write( "After that, each term is the product of the two preceding terms:\r\n" );
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document.write( "1, 9, 1×9=9, 9×9=81, 9×81=729, 81×729=59049, 729×59049=43046721, etc. \r\n" );
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document.write( "6, 0, 0, 0, ?\r\n" );
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document.write( "6, 0, 0, 0, 6, 0, 0, 0, 6, 0, 0, 0, 6, 0, 0, 0, etc.\r\n" );
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document.write( "6, then three zeros, then 6, then three zeros, then 6, then three zeros, etc. \r\n" );
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document.write( "5, 5, 25, 25, ?\r\n" );
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document.write( "The first two terms are 5's.  After that each pair of terms are both the next higher power of 5. \r\n" );
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document.write( "5¹, 5¹, 5², 5², 5³, 5³, 5⁴, 5⁴, 5⁵, 5⁵, etc. \r\n" );
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document.write( " or\r\n" );
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document.write( "5, 5, 25, 25, 125, 125, 625, 625, 3125, 3125, etc.\r\n" );
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document.write( "1, 2, 20, 40, ?\r\n" );
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document.write( "The first two terms are 1 and 2.\r\n" );
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document.write( "After that, the next two terms, respectively, are 20 times the preceding \r\n" );
document.write( "two terms, respectively.\r\n" );
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document.write( "1, 2, 20, 40, 400, 800, 8000, 16000, etc.\r\n" );
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document.write( "Edwin

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