document.write( "Question 849387: Evaluate each series using sum formulas.\r
\n" ); document.write( "\n" ); document.write( "3 + 6 + 12 + 24 + …; n = 8 ie the sum of the 1st eight terms
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Algebra.Com's Answer #511510 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
 
\n" ); document.write( "Hi,
\n" ); document.write( "{3 + 6 + 12 + 24 + …} Geometric series r = 2
\n" ); document.write( "\"a%5Bn%5D+=+a%5B1%5D%2Ar%5E%28n-1%29\"
\n" ); document.write( "\"sum%28+a%5Bi%5D%2C+i=1%2C+8+%29+=+a%281-r%5En%29%2F%281-r%29\"= \"3%281-2%5E8%29%2F%28-1%29\" = 765
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