document.write( "Question 924963: Find the sum of first 7 terms 4,12,36?
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Algebra.Com's Answer #561227 by MathTherapy(10552)\"\" \"About 
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Find the sum of first 7 terms 4,12,36?
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document.write( "This is a geometric progression (GP) so use the formula for the sum of a G.P.: 
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document.write( "\"S%5Bn%5D+=+a%5B1%5D%2A%28%281+-+r%5En%29%2F%281+-+r%29%29\"
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document.write( "\"n+=+7\"
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document.write( "\"S%5Bn%5D\" is the sum of the series you're seeking
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document.write( "\"a%5B1%5D+=+4\"
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document.write( "Common ratio or \"r+=+3\" \n" );
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