document.write( "Question 865875: find the sum of the first 20 terms of the sequence defined by an=5n+4 \n" ); document.write( "
Algebra.Com's Answer #521974 by richwmiller(17219)\"\" \"About 
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an=5n+4
\n" ); document.write( "a1=9
\n" ); document.write( "a2=14
\n" ); document.write( "a3=19
\n" ); document.write( "S = ½(18 + (19)5)20
\n" ); document.write( "S = 1130
\n" ); document.write( "d=5\r
\n" ); document.write( "\n" ); document.write( "an = 9 + 5(n - 1)\r
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