document.write( "Question 888713: An arithmetic sequence whose fourth entry is 2 and whose seventh entry is 7 \n" ); document.write( "
Algebra.Com's Answer #537613 by richwmiller(17219)\"\" \"About 
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An = A1 + (n - 1)d
\n" ); document.write( "7= A1 + 6d
\n" ); document.write( "2= A1 + 3d
\n" ); document.write( "5=3d
\n" ); document.write( "5/3=d
\n" ); document.write( "2=A1+3*5/3
\n" ); document.write( "2=A1+5
\n" ); document.write( "A1=-3\r
\n" ); document.write( "\n" ); document.write( "An = A1 + (n - 1)d
\n" ); document.write( "An = -3 + 5/3(n - 1)
\n" ); document.write( "An = -3 + 5/3n - 5/3
\n" ); document.write( "An = (5n - 14)/3\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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