document.write( "Question 900663: the fifth and eighth terms of a sequence of real numbers are 7 and 8. What is the first term? \n" ); document.write( "
Algebra.Com's Answer #546082 by josgarithmetic(39618)\"\" \"About 
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Many possible solutions. What kind of sequence?\r
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\n" ); document.write( "\n" ); document.write( "T=F+(n-1)d, general term for arithmetic sequence.
\n" ); document.write( "F, first term
\n" ); document.write( "n, index of sequence
\n" ); document.write( "d, common difference\r
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\n" ); document.write( "\n" ); document.write( "\"system%28F%2B%285-1%29d=7%2CF%2B%288-1%29d=8%29\"
\n" ); document.write( "\"system%28F%2B4d=7%2CF%2B7d=8%29\"
\n" ); document.write( "\"3d=1\"
\n" ); document.write( "\"d=1%2F3\"\r
\n" ); document.write( "\n" ); document.write( "\"F=7-4%2F3\"
\n" ); document.write( "\"F=21%2F3-4%2F3\"
\n" ); document.write( "\"highlight%28highlight%28F=17%2F3%29%29\"----the first term\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28T=17%2F3%2B%28n-1%29%2A%281%2F3%29%29\"---general term for this arithmetic sequence
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