document.write( "Question 1160228: Find S20 for the arithmetic series 24+16+8 + … . \n" ); document.write( "
Algebra.Com's Answer #783496 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "Find S20 for the arithmetic series 24+16+8 + … .
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Formula for the SUM of an A.P.: \"matrix%281%2C3%2C+S%5Bn%5D%2C+%22=%22%2C+%28n%2F2%29%282a%5B1%5D+%2B+%28n+-+1%29d%29%29\"
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\n" ); document.write( "\"matrix%281%2C3%2C+S%5Bn%5D%2C+%22=%22%2C+%28n%2F2%29%282a%5B1%5D+%2B+%28n+-+1%29d%29%29\" becomes: \n" ); document.write( "
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