document.write( "Question 614130: What is the sum of the finite arithmetic series? \n" ); document.write( "
Algebra.Com's Answer #386414 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi,
\n" ); document.write( "What is the sum of the finite arithmetic series?
\n" ); document.write( "Knowing the 1st and nth Term:
\n" ); document.write( "\"S%5Bn%5D=%28n%28a%5B1%5D%2Ba%5Bn%5D%29%29%2F2\"
\n" ); document.write( "In general:
\n" ); document.write( "\"S%5Bn%5D=%28n%2F2%29%282%2Aa%5B1%5D%2B+%28n-1%29d%29\"
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