document.write( "Question 856924: Use the formula to evaluate the series 2-10+50-250...-a6 \n" ); document.write( "
Algebra.Com's Answer #516226 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,
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document.write( "2-10+50-250...-a6
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document.write( "\"a%5Bn%5D+=+2%28-5%29%5E%28n-1%29\"
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document.write( "\"a%5B5%5D+=+2%28-5%29%5E%284%29+=+1250\"
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document.write( "\"a%5B6%5D+=+2%28-5%29%5E%285%29+=+-6250\" \n" );
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