document.write( "Question 575136: The ninth term of the arithmetic sequence is 1/6 ; the sixteenth term is 2 ½. Find the first term. \n" ); document.write( "

Algebra.Com's Answer #369390 by chana(69) $\"\"$ $\"About$

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The ninth term of the arithmetic sequence is 1/6 ; the sixteenth term is 2 ½. Find the first term.
\n" ); document.write( "sol:
\n" ); document.write( "taking it as Arithmetic progression we can get 2 eqn based on this formula : a +(n-1)d.. where a= first term , d = common difference , n = position of the term
\n" ); document.write( "a+8d=1/6
\n" ); document.write( "a+15d=5/2
\n" ); document.write( "solving this, a= (-5/2)
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