document.write( "Question 933251: For the sequence 1/3, 1/3^2, 1/3^3, 1/3^4, 1/3^5,..., find its fifth partial sum and its sixth partial sum.
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Algebra.Com's Answer #566705 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Each term of
1/3, 1/3^2, 1/3^3, 1/3^4, 1/3^5, ...
is in the form \"a%2A%28r%29%5E%28n-1%29\" where \"a+=+1%2F3\" and \"r+=+1%2F3\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+a%2A%28%281-r%5En%29%2F%281-r%29%29\" Geometric series nth partial sum formula.\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F3%29%2A%28%281-%281%2F3%29%5En%29%2F%281-1%2F3%29%29\" Plug in \"r+=+1%2F3\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F3%29%2A%28%281-%281%2F3%29%5En%29%2F%282%2F3%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F3%29%2A%283%2F2%29%2A%281-%281%2F3%29%5En%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F2%29%2A%281-%281%2F3%29%5En%29\"\r
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\n" ); document.write( "\n" ); document.write( "Fifth Partial Sum (n = 5)\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F2%29%2A%281-%281%2F3%29%5En%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B5%5D+=+%281%2F2%29%2A%281-%281%2F3%29%5E5%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B5%5D+=+%281%2F2%29%2A%281-1%2F243%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B5%5D+=+%281%2F2%29%2A%28242%2F243%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B5%5D+=+121%2F243\"\r
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\n" ); document.write( "\n" ); document.write( "The fifth partial sum is \"121%2F243\" which is approximately \"0.49794238683128%0D%0A%0D%0A%0D%0A%0D%0A\" (I'd stick to the exact answer whenever you can)\r
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\n" ); document.write( "\n" ); document.write( "Sixth Partial Sum (n = 6)\r
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\n" ); document.write( "\n" ); document.write( "\"S%5Bn%5D+=+%281%2F2%29%2A%281-%281%2F3%29%5En%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B6%5D+=+%281%2F2%29%2A%281-%281%2F3%29%5E6%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B6%5D+=+%281%2F2%29%2A%281-1%2F729%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B6%5D+=+%281%2F2%29%2A%28728%2F729%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"S%5B6%5D+=+364%2F729\"\r
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\n" ); document.write( "\n" ); document.write( "The sixth partial sum is exactly \"364%2F729\" which is approximately \"0.49931412894376\"\r
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\n" ); document.write( "\n" ); document.write( "If you need more one-on-one help, email me at jim_thompson5910@hotmail.com. You can ask me a few more questions for free, but afterwards, I would charge you ($2 a problem to have steps shown or $1 a problem for answer only).\r
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\n" ); document.write( "\n" ); document.write( "Alternatively, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Any amount is greatly appreciated as it helps me a lot. This donation is to support free tutoring. Thank you.\r
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\n" ); document.write( "\n" ); document.write( "Jim\r
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