document.write( "Question 1029525: a4=24 a7=64/9
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Algebra.Com's Answer #644635 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
\"A%5B4%5D=A%5B1%5D%2B%284-1%29d=A%5B0%5D%2B3d=24\"
\n" ); document.write( "\"A%5B7%5D=A%5B1%5D%2B%287-1%29d=A%5B0%5D%2B6d=64%2F9\"
\n" ); document.write( "Subtracting,
\n" ); document.write( "\"A%5B1%5D%2B6d-A%7B1%5D-3d=64%2F9-24\"
\n" ); document.write( "\"3d=-152%2F9\"
\n" ); document.write( "\"d=-152%2F27\"
\n" ); document.write( "So then,
\n" ); document.write( "\"A%5B1%5D%2B3%28-152%2F27%29=24\"
\n" ); document.write( "\"A%5B1%5D-152%2F9=216%2F9\"
\n" ); document.write( "\"A%5B1%5D=368%2F9\"
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\n" ); document.write( "\"A%5Bn%5D=368%2F9%2B%28n-1%29%28-152%2F27%29\"
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\n" ); document.write( "\"S%5Bn%5D=%28n%2F2%29%28A%5B1%5D%2BA%5Bn%5D%29\"
\n" ); document.write( "\"S%5Bn%5D=+%28n%2F2%29%28368%2F9%2B368%2F9%2B%28n-1%29%28-152%2F27%29%29+\"
\n" ); document.write( "\"S%5Bn%5D=%284%2F27%29n%28295-19n%29\"
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