document.write( "Question 881938: Can you please show me how to work this out? I would really be thankful!!\r
\n" ); document.write( "\n" ); document.write( "What is the sum of the arithmetic sequence 3, 9, 15..., if there are 26 terms?\r
\n" ); document.write( "\n" ); document.write( " 1,452\r
\n" ); document.write( "\n" ); document.write( " 1,728\r
\n" ); document.write( "\n" ); document.write( " 2,028\r
\n" ); document.write( "\n" ); document.write( " 2,268
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Algebra.Com's Answer #532617 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!
{3, 9, 15, ...}
\n" ); document.write( "Arithmetic Sequence: d = 6
\n" ); document.write( "Note typo here
\n" ); document.write( "a[26] = 3 + 25d = 3 + \"++highlight_green%28150%29+\"
\n" ); document.write( "\"S%5Bn%5D=%28n%28a%5B1%5D%2Ba%5Bn%5D%29%29%2F2\"
\n" ); document.write( "S[26] = 26(3 + 153)/2 = 2,208
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