document.write( "Question 744976: Find A1 and d for an arithmetic sequence with these terms:\r
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\n" ); document.write( "\n" ); document.write( "A7 = 18
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Algebra.Com's Answer #453632 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Only giving here two hints.\r
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\n" ); document.write( "\n" ); document.write( "How many differences between A1 and A4? How many differences between A4 and A7?
\n" ); document.write( "Arithmetic Sequences depends on common difference between successive terms.
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