document.write( "Question 460585: Find the sum of the arithmetic series where a[1]=7, n=31, and a[n]=127 \n" ); document.write( "
Algebra.Com's Answer #315972 by edjones(8007)\"\" \"About 
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S=n/2(a[1]+a[n])
\n" ); document.write( "=31/2(7+127)
\n" ); document.write( "=31/2 * 134
\n" ); document.write( "=31*67
\n" ); document.write( "=2,077
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